Bug 2571415 (CVE-2026-126498)

Summary: CVE-2026-126498 github.com/writefreely/writefreely: WriteFreely: Stored cross-site scripting via unsanitized post slug
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerability-draftAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in WriteFreely. An authenticated user can supply a crafted post slug during post creation that is embedded into links without proper sanitization. This issue can lead to stored cross-site scripting (XSS), enabling the execution of arbitrary script in the context of readers, newsletter recipients, and feed subscribers.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-11 01:11:42 UTC
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.