CVE-2026-104465 YesWiki before 4.6.7 Reflected XSS via field Parameter in mail Handler
Unauthenticated attackers can execute arbitrary JavaScript in victims' browsers via a crafted link exploiting a reflected XSS vulnerability in the mail handler.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-104465?
CVE-2026-104465 is a medium-severity cross-site scripting vulnerability in yeswiki, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
YesWiki before 4.6.7 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts via the field parameter of the mail handler. Attackers can craft links whose field value breaks out of the ajax-mail-form action attribute to execute JavaScript in victims' browsers.
Weakness: CWE-79
Which versions are affected by CVE-2026-104465?
How do I fix CVE-2026-104465?
No fix has been published for CVE-2026-104465 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-2026-104465 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-104465 exists.
Sources
Also known as GHSA-2fc6-rvp3-fgfj, GHSA-m338-cjqw-rxwv.