CVE-2026-18720 kalcaddle kodbox msgWarning Plugin action improper authorization
Remote attackers can bypass authorization checks in the msgWarning plugin of kodbox to perform unauthorized actions.
- 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-2026-18720?
CVE-2026-18720 is a medium-severity missing authorization vulnerability in kalcaddle kodbox, published on 4 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw has been found in kalcaddle kodbox 1.67 Build 02. This vulnerability affects unknown code of the file /index.php?plugin/msgWarning/action of the component msgWarning Plugin. Executing a manipulation can lead to improper authorization. It is possible to launch the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-18720?
How do I fix CVE-2026-18720?
No fix has been published for CVE-2026-18720 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-18720 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18720 exists.
Sources
Also known as GHSA-mv6j-rvc6-f296.