XSS in Yeswiki
CVE-2026-104450
YesWiki before 4.6.7 contains a missing authorization flaw in the pointimage action (tools/attach/actions/pointimage.php), which saves content to an attacker-chosen page with write ACL checks bypassed. Unauthenticated attackers can POST pagetag, title, and description fields to any page rendering {{pointimage}} to append raw HTML or JavaScript to any wiki page, including pages whose write ACL restricts editing, causing stored cross-site scripting in viewers' and administrators' browsers.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/YesWiki/yeswiki/security/advisories/GHSA-7547-q56p-h99v (vendor-advisory)
- www.vulncheck.com/advisories/yeswiki-before-4.6.7-acl-bypass-and-stored-xss-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-104450?
- CVE-2026-104450 is a medium-severity vulnerability in Yeswiki, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-10-02.
- How severe is CVE-2026-104450?
- Medium severity. CVSS v3 base score is 6.5 out of 10.