CVE-2024-54123: backdrop · Cross-site Scripting
Affects backdropSource CVE Database V5
Not known to be exploited · CVSS 6.1 Medium : upgrade to 1.29.2 or 1.28.4 when convenient.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.29.2, 1.28.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 29 Nov 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade backdrop/backdrop to 1.29.2 or 1.28.4.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Packagistbackdrop/backdroppkg:composer/backdrop/backdropOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
To mitigate CVE-2024-54123, organizations should immediately review their Backdrop CMS installations and identify if they are running affected versions prior to 1.28.4 or 1.29.2. They should restrict or disable the use of SVG tags in text formats unless absolutely necessary. If SVG support is required, implement strict sanitization and validation of SVG content to remove or neutralize embedded scripts. Additionally, implement Content Security Policy (CSP) headers to restrict script execution sources and reduce the impact of potential XSS attacks. Educate users and administrators about the risks of clicking untrusted links or uploading unverified SVG files. Regularly audit text format configurations and user permissions to minimize exposure. Employ web application firewalls (WAFs) with rules targeting XSS payloads as a temporary protective measure. Finally, conduct security testing and code reviews focusing on input sanitization and output encoding related to rich text and SVG content handling.
Description
Backdrop CMS before 1.28.4 and 1.29.x before 1.29.2 allows XSS via an SVG document, if the SVG tag is allowed for a text format.