CVE-2026-2543 vichan-devel vichan Password Change pages.php unverified password change
Attackers can change user passwords without verification in vichan-devel, leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2543?
CVE-2026-2543 is a medium-severity authentication bypass vulnerability in vichan-devel vichan, published on 16 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A vulnerability was identified in vichan-devel vichan up to 5.1.5. This vulnerability affects unknown code of the file inc/mod/pages.php of the component Password Change Handler. The manipulation of the argument Password leads to unverified password change. The attack can be initiated remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-2543?
How do I fix CVE-2026-2543?
No fix has been published for CVE-2026-2543 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-2543 being exploited?
There is no known exploitation of CVE-2026-2543 in the wild and no public exploit code.
Sources
Also known as GHSA-c68v-2764-rf86.