CVE-2026-100313 mathurvishal CloudClassroom-PHP-Project updatequery.php cross site scripting
Remote attackers can inject malicious scripts via the queryx parameter in updatequery.php, potentially compromising user sessions.
- 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-2026-100313?
CVE-2026-100313 is a medium-severity cross-site scripting vulnerability in mathurvishal CloudClassroom-PHP-Project, published on 26 Sep 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
A weakness has been identified in mathurvishal CloudClassroom-PHP-Project up to 5dadec098bfbbf3300d60c3494db3fb95b66e7be. This affects an unknown function of the file updatequery.php. Executing a manipulation of the argument queryx can lead to cross site scripting. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-100313?
How do I fix CVE-2026-100313?
No fix has been published for CVE-2026-100313 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-2026-100313 being exploited?
There is no known exploitation of CVE-2026-100313 in the wild and no public exploit code.
Sources
Also known as GHSA-9f8m-gw4v-5223.