Sites can bypass security checks on permissions to install lightweight themes by…
Priority LOW 29Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.
Summary
Sites can bypass security checks on permissions to install lightweight themes by manipulating the "baseURI" property of the theme element. This could allow a malicious site to install a theme without user interaction which could contain offensive or embarrassing images. This vulnerability affects Thunderbird < 52.8, Thunderbird ESR < 52.8, Firefox < 60, and Firefox ESR < 52.8.
Why it matters now
EPSS 0.02332 83rd percentileScored 2026-11-07
Fix Fixed Thunderbird (Mozilla): 52.8Thunderbird ESR (Mozilla): 52.8+2 more productsRed Hat: 4 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Mozilla | Thunderbird | before 52.8 | 52.8 | Patch available | CNA |
| Mozilla | Thunderbird ESR | before 52.8 | 52.8 | Patch available | CNA |
| Mozilla | Firefox | before 60 | 60 | Patch available | CNA |
| Mozilla | Firefox ESR | before 52.8 | 52.8 | Patch available | CNA |
- Thunderbird VendorMozilla Affected before 52.8 Fixed in 52.8 Patch available CNA
- Thunderbird ESR VendorMozilla Affected before 52.8 Fixed in 52.8 Patch available CNA
- Firefox VendorMozilla Affected before 60 Fixed in 60 Patch available CNA
- Firefox ESR VendorMozilla Affected before 52.8 Fixed in 52.8 Patch available CNA
CPE configurations NVD · 20
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 52.8.0; before 60.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 52.8.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird_esr:*:*:*:*:*:*:*:* | before 52.8.0 | Vulnerable | Mozilla |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* | 17.10 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 52.8.0; before 60.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 52.8.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird_esr:*:*:*:*:*:*:*:* Versions before 52.8.0 Vulnerable ·Mozilla
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* Versions 17.10 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
Show 10 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* | 7.5 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
Remediation
- Fix · CNA Thunderbird (Mozilla) Fixed in 52.8
- Fix · CNA Thunderbird ESR (Mozilla) Fixed in 52.8
- Fix · CNA Firefox (Mozilla) Fixed in 60
- Fix · CNA Firefox ESR (Mozilla) Fixed in 52.8
Red Hat 4 advisories
- RHSA-2018:1726 Released 2018-05-24 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Desktop (v. 6) thunderbird-52.8.0-2.el6_9
- Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-52.8.0-2.el6_9
- Red Hat Enterprise Linux Workstation (v. 6) thunderbird-52.8.0-2.el6_9
- RHSA-2018:1725 Released 2018-05-24 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Client (v. 7) thunderbird-52.8.0-1.el7_5
- Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-52.8.0-1.el7_5
- Red Hat Enterprise Linux Workstation (v. 7) thunderbird-52.8.0-1.el7_5
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) thunderbird-52.8.0-1.el7_5
- RHSA-2018:1415 Released 2018-05-14 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux Client (v. 7) firefox-52.8.0-1.el7_5
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-52.8.0-1.el7_5
- Red Hat Enterprise Linux Server (v. 7) firefox-52.8.0-1.el7_5
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-52.8.0-1.el7_5
- Red Hat Enterprise Linux Workstation (v. 7) firefox-52.8.0-1.el7_5
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-52.8.0-1.el7_5
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox-52.8.0-1.el7_5
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) firefox-52.8.0-1.el7_5
Show 1 more Red Hat advisories
- RHSA-2018:1414 Released 2018-05-14 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux Desktop (v. 6) firefox-52.8.0-1.el6_9
- Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-52.8.0-1.el6_9
- Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-52.8.0-1.el6_9
- Red Hat Enterprise Linux Server (v. 6) firefox-52.8.0-1.el6_9
- Red Hat Enterprise Linux Server Optional (v. 6) firefox-52.8.0-1.el6_9, firefox-52.8.0-1.el6_9.ppc
- Red Hat Enterprise Linux Workstation (v. 6) firefox-52.8.0-1.el6_9
- Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-52.8.0-1.el6_9
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Mozilla Firefox, Firefox ESR and 2 more products — USN-3645-1
24 records Highest priority Priority MEDIUM 6 MEDIUM, 18 LOW
Other records, highest priority first
- TI-2018-03723 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 61
- TI-2018-03722 Code injection in Mozilla Firefox ESRPriority MEDIUM 51
- TI-2018-03719 Use after free in Mozilla ThunderbirdPriority MEDIUM 48
- Advisory ·
Mozilla Firefox, Firefox ESR and 2 more products — RHSA-2018:1725
12 records Highest priority Priority MEDIUM 6 MEDIUM, 6 LOW
Other records, highest priority first
- TI-2018-03723 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 61
- TI-2018-03746 Memory corruption in Mozilla Thunderbird ESRPriority MEDIUM 48
- TI-2018-03719 Use after free in Mozilla ThunderbirdPriority MEDIUM 48
Show 6 more groups
- Advisory ·
Mozilla Firefox, Firefox ESR and 2 more products — RHSA-2018:1726
12 records Highest priority Priority MEDIUM 6 MEDIUM, 6 LOW
Other records, highest priority first
- TI-2018-03723 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 61
- TI-2018-03746 Memory corruption in Mozilla Thunderbird ESRPriority MEDIUM 48
- TI-2018-03719 Use after free in Mozilla ThunderbirdPriority MEDIUM 48
- Advisory ·
Mozilla Firefox, Firefox ESR and 2 more products — USN-3660-1
12 records Highest priority Priority MEDIUM 6 MEDIUM, 6 LOW
Other records, highest priority first
- TI-2018-03723 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 61
- TI-2018-03746 Memory corruption in Mozilla Thunderbird ESRPriority MEDIUM 48
- TI-2018-03719 Use after free in Mozilla ThunderbirdPriority MEDIUM 48
- Advisory ·
Mozilla Firefox, Firefox ESR and 2 more products — DSA-4209
12 records Highest priority Priority MEDIUM 6 MEDIUM, 6 LOW
Other records, highest priority first
- TI-2018-03723 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 61
- TI-2018-03746 Memory corruption in Mozilla Thunderbird ESRPriority MEDIUM 48
- TI-2018-03719 Use after free in Mozilla ThunderbirdPriority MEDIUM 48
- Advisory ·
Mozilla Firefox, Firefox ESR and 2 more products — RHSA-2018:1414
9 records Highest priority Priority MEDIUM 7 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2018-03723 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 61
- TI-2018-03722 Code injection in Mozilla Firefox ESRPriority MEDIUM 51
- TI-2018-03746 Memory corruption in Mozilla Thunderbird ESRPriority MEDIUM 48
- Advisory ·
Mozilla Firefox, Firefox ESR and 2 more products — RHSA-2018:1415
9 records Highest priority Priority MEDIUM 7 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2018-03723 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 61
- TI-2018-03722 Code injection in Mozilla Firefox ESRPriority MEDIUM 51
- TI-2018-03746 Memory corruption in Mozilla Thunderbird ESRPriority MEDIUM 48
- Advisory ·
Mozilla Firefox, Firefox ESR and 2 more products — DSA-4199
9 records Highest priority Priority MEDIUM 7 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2018-03723 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 61
- TI-2018-03722 Code injection in Mozilla Firefox ESRPriority MEDIUM 51
- TI-2018-03746 Memory corruption in Mozilla Thunderbird ESRPriority MEDIUM 48
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2018:1415, RHSA-2018:1725 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2018:1415 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2018:1414, RHSA-2018:1726 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2018:1414 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2018:1414 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2018:1414 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2018:1415 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2018:1414, RHSA-2018:1726 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2018:1415, RHSA-2018:1725 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2018:1414, RHSA-2018:1726 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2018:1415, RHSA-2018:1725 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2018:1414 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2018:1415 |
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) | Fixed | RHSA-2018:1415 |
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) | Fixed | RHSA-2018:1415, RHSA-2018:1725 |
Not affected: 1 product
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2018-5168
- 2026-10-03 Alias added: GHSA-mc9q-rpjx-f8px
References
Advisory 16
- RHSA-2018:1415
- GLSA-201810-01
- RHSA-2018:1726
- RHSA-2018:1414
- GLSA-201811-13
- https://www.mozilla.org/security/advisories/mfsa2018-13/
- https://www.mozilla.org/security/advisories/mfsa2018-11/
- USN-3660-1
- DSA-4199
- USN-3645-1
- [debian-lts-announce] 20180525 [SECURITY] [DLA 1382-1] thunderbird security update
- [debian-lts-announce] 20180511 [SECURITY] [DLA 1376-1] firefox-esr security update
- RHSA-2018:1725
- DSA-4209
- https://bugzilla.mozilla.org/show_bug.cgi?id=1449548
- https://www.mozilla.org/security/advisories/mfsa2018-12/
More Mozilla Firefox vulnerabilities
- TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
- TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
- TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
- TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
- TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
- TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2018-5168 · CVE Program
- CVE-2018-5168 · NVD
- FIRST EPSS
- GHSA-mc9q-rpjx-f8px · GitHub Advisory Database · CC BY 4.0
- CVE-2018-5168 · Red Hat security data · CC BY 4.0
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