A Cross Site Request Forgery (CSRF) vulnerability exists in Backdrop CMS 1.20, which…
Priority MEDIUM 42CWE-352Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-352.
Summary
A Cross Site Request Forgery (CSRF) vulnerability exists in Backdrop CMS 1.20, which allows Remote Attackers to gain Remote Code Execution (RCE) on the Hosting Webserver via uploading a maliciously add-on with crafted PHP file. NOTE: the vendor disputes this because the attack requires a session cookie of a high-privileged authenticated user who is entitled to install arbitrary add-ons
Why it matters now
EPSS 0.01821 78th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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:1.20.0:*:*:*:*:*:*:* | 1.20.0 | Vulnerable | backdropcms |
- cpe:2.3:a:backdropcms:backdrop:1.20.0:*:*:*:*:*:*:* Versions 1.20.0 Vulnerable ·backdropcms
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-45268
- 2026-10-03 Alias added: GHSA-cxfw-78g3-3grg
References
More backdropcms Backdrop vulnerabilities
- TI-2019-08480 jQuery before 3.4.0, as used in Drupal, Backdrop CMS, and other products, mishandles… CVSS 3.1MEDIUM 6.1
- TI-2022-20387 Backdrop CMS version 1.23.0 was discovered to contain a stored cross-site scripting (XSS) vulnerability via 'Comment.' . CVSS 3.1MEDIUM 4.8
- TI-2022-20384 Backdrop CMS version 1.23.0 was discovered to contain a stored cross-site scripting (XSS)… CVSS 3.1MEDIUM 4.8
- TI-2019-10979 Backdrop CMS 1.12.x before 1.12.8 and 1.13.x before 1.13.3 doesn't sufficiently filter… CVSS 3.0MEDIUM 6.1
- TI-2024-27769 Backdrop CMS before 1.27.3 and 1.28.x before 1.28.2 does not sufficiently sanitize field… CVSS 3.1MEDIUM 6.1
- TI-2022-08438 A stored cross-site scripting (XSS) vulnerability in the Add Link function of BackdropCMS… CVSS 3.1MEDIUM 5.4
Sources
- CVE-2021-45268 · CVE Program
- CVE-2021-45268 · NVD
- FIRST EPSS
- GHSA-cxfw-78g3-3grg · 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