CVE-2026-104450 YesWiki before 4.6.7 ACL Bypass and Stored XSS via pointimage Action
Unauthenticated attackers can bypass write ACLs to inject stored XSS via the pointimage action, compromising viewer and administrator sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104450?
CVE-2026-104450 is a high-severity cross-site scripting vulnerability in yeswiki, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-104450?
How do I fix CVE-2026-104450?
No fix has been published for CVE-2026-104450 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-104450 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-104450 exists.
Sources
Also known as GHSA-7547-q56p-h99v, GHSA-mf95-w988-564j.