An issue was discovered in GNU Mailman before 2.1.28.
Priority LOW 34CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 2 fixed, 2 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA, GitHub and Red Hat.
Summary
An issue was discovered in GNU Mailman before 2.1.28. A crafted URL can cause arbitrary text to be displayed on a web page from a trusted site.
Why it matters now
EPSS 0.0253 85th percentileScored 2026-11-07
Fix Partial mailman (PyPI): 2.1.28Red Hat: 1 advisoryRed Hat: 2 fixed, 2 without a fix
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | mailman (PyPI) | before 2.1.28 | 2.1.28 | Patch available | GHSA-xqvg-xm9m-p2c4 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- mailman (PyPI) Vendor— Affected before 2.1.28 Fixed in 2.1.28 Patch available GHSA-xqvg-xm9m-p2c4
Remediation
- Fix · GHSA-xqvg-xm9m-p2c4 mailman (PyPI) Fixed in 2.1.28 Advisory →
Red Hat 1 advisory
- RHSA-2020:1054 Released 2020-03-31 · Red Hat rating Moderatemailman security and bug fix update
- Red Hat Enterprise Linux Server (v. 7) mailman-3:2.1.15-30.el7
- Red Hat Enterprise Linux Workstation (v. 7) mailman-3:2.1.15-30.el7
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2020:1054 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2020:1054 |
Not affected: 1 product
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2018-13796
- 2026-10-03 Alias added: GHSA-xqvg-xm9m-p2c4
References
Advisory 6
More GNU Mailman vulnerabilities
- TI-2025-28486 Path traversal in GNU Mailman CVSS 3.1HIGH 7.5
- TI-2025-28487 OS command injection in GNU Mailman CVSS 3.1HIGH 8.1
- TI-2025-28488 Incorrect authorization in GNU Mailman CVSS 3.1MEDIUM 5.3
- TI-2015-02450 Directory traversal vulnerability in GNU Mailman before 2.1.20, when not using a static… CVSS 2.0HIGH 7.6
- TI-2002-00830 Cross-site scripting vulnerability in Mailman before 2.0.12 allows remote attackers to… CVSS 2.0HIGH 7.5
- TI-2002-00374 Cross-site scripting vulnerabilities in Mailman before 2.0.11 allow remote attackers to… CVSS 2.0HIGH 7.5
Sources
- CVE-2018-13796 · CVE Program
- CVE-2018-13796 · NVD
- FIRST EPSS
- GHSA-xqvg-xm9m-p2c4 · GitHub Advisory Database · CC BY 4.0
- CVE-2018-13796 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences