Backdrop CMS version 1.11.0 and earlier contains a Cross Site Scripting (XSS)…
Priority LOW 23CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
Backdrop CMS version 1.11.0 and earlier contains a Cross Site Scripting (XSS) vulnerability in Sanitization of custom class names used on blocks and layouts. that can result in Execution of JavaScript from an unexpected source.. This attack appear to be exploitable via A user must be directed to an affected page while logged in.. This vulnerability appears to have been fixed in 1.11.1 and later.
Why it matters now
EPSS 0.00741 54th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:backdropcms:backdrop_cms:*:*:*:*:*:*:*:* | up to 1.11.0 | Vulnerable | backdropcms |
- cpe:2.3:a:backdropcms:backdrop_cms:*:*:*:*:*:*:*:* Versions up to 1.11.0 Vulnerable ·backdropcms
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-1000813
- 2026-10-03 Alias added: GHSA-8wm7-hhmh-8mwj
References
More backdropcms Backdrop Cms vulnerabilities
- TI-2025-39465 Host Header Injection vulnerability in Backdrop CMS 1.32.1 allows attackers to manipulate… CVSS 3.1MEDIUM 6.1
- TI-2023-14781 A stored Cross-site scripting (XSS) issue in Text Editors and Formats in Backdrop CMS… CVSS 3.1MEDIUM 4.8
- TI-2022-20386 Backdrop CMS version 1.23.0 was discovered to contain a stored cross-site scripting (XSS)… CVSS 3.1MEDIUM 4.8
- TI-2022-20385 Backdrop CMS version 1.23.0 was discovered to contain a stored cross-site scripting (XSS)… CVSS 3.1MEDIUM 4.8
- TI-2025-18731 Cross-site scripting in backdropcms backdrop CVSS 3.1MEDIUM 4.4
- TI-2019-10981 Backdrop CMS 1.12.x before 1.12.8 and 1.13.x before 1.13.3 allows the upload of… CVSS 3.0CRITICAL 9.8
Sources
- CVE-2018-1000813 · CVE Program
- CVE-2018-1000813 · NVD
- FIRST EPSS
- GHSA-8wm7-hhmh-8mwj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences