CVE-2026-126498 | BDVDB-2026-404829 Detail
Musing StudioWriteFreely
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.
Impact#
Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact none. Attack vector: network.
Weaknesses#
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References#
- https://github.com/writefreely/writefreely/security/advisories/GHSA-cwxm-8ch5-j2vh
- https://github.com/writefreely/writefreely/commit/d7231d81a914f1314a218d5e8fde6e0341391ccd
- https://github.com/writefreely/writefreely/releases/tag/v0.17.3
- https://github.com/writefreely/writefreely/blob/v0.17.2/postrender.go#L117-L121
- https://github.com/writefreely/writefreely/blob/v0.17.2/database.go#L702-L705
- https://www.vulncheck.com/advisories/writefreely-before-0.17.3-stored-xss-via-unsanitized-post-slug
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.