CVE-2026-126498
MEDIUM
NVD
CVSS Score
5.4
Severity
MEDIUM
Published
Nov 11, 2026
Vendor
unknown
Description
WriteFreely before 0.17.3 contains a stored cross-site scripting vulnerability that allows authenticated authors to inject HTML by supplying a malicious post slug via the CreatePost API. The raw slug is concatenated into an anchor by augmentReadingDestination() for paid-shortcode posts, executing script for RSS/Atom feed readers, newsletter recipients and ActivityPub viewers.
References
- https://github.com/writefreely/writefreely/blob/v0.17.2/database.go#L702-L705
- https://github.com/writefreely/writefreely/blob/v0.17.2/postrender.go#L117-L121
- https://github.com/writefreely/writefreely/commit/d7231d81a914f1314a218d5e8fde6e0341391ccd
- https://github.com/writefreely/writefreely/releases/tag/v0.17.3
- https://github.com/writefreely/writefreely/security/advisories/GHSA-cwxm-8ch5-j2vh