Vulnerability Description
An XSS issue was discovered in Backdrop CMS 1.28.x before 1.28.5 and 1.29.x before 1.29.3. It doesn't sufficiently isolate long text content when the CKEditor 5 rich text editor is used. This allows a potential attacker to craft specialized HTML and JavaScript that may be executed when an administrator attempts to edit a piece of content. This vulnerability is mitigated by the fact that an attacker must have the ability to create long text content (such as through the node or comment forms) and an administrator must edit (not view) the content that contains the malicious content. This problem only exists when using the CKEditor 5 module.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Backdropcms | Backdrop Cms | >= 1.28.0, < 1.28.5 |
Related Weaknesses (CWE)
References
- https://backdropcms.org/security/backdrop-sa-core-2025-001Vendor Advisory
- https://medium.com/@rudranshsinghrajpurohit/cve-2025-25062-stored-cross-site-scrThird Party AdvisoryExploit
- https://www.getastra.com/blog/vulnerability/cve-2025-25062stored-cross-site-scriThird Party AdvisoryExploit
FAQ
What is CVE-2025-25062?
CVE-2025-25062 is a vulnerability with a CVSS score of 4.4 (MEDIUM). An XSS issue was discovered in Backdrop CMS 1.28.x before 1.28.5 and 1.29.x before 1.29.3. It doesn't sufficiently isolate long text content when the CKEditor 5 rich text editor is used. This allows a...
How severe is CVE-2025-25062?
CVE-2025-25062 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-25062?
Check the references section above for vendor advisories and patch information. Affected products include: Backdropcms Backdrop Cms.