CVE-2026-5537 halex CourseSEL HTTP GET Parameter IndexController.class.php check_sel sql injection
Remote attackers can exploit SQL injection in CourseSEL via the seid parameter to read or modify database contents.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5537?
CVE-2026-5537 is a medium-severity SQL injection vulnerability in halex CourseSEL, published on 5 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security vulnerability has been detected in halex CourseSEL up to 1.1.0. Affected by this vulnerability is the function check_sel of the file Apps/Index/Controller/IndexController.class.php of the component HTTP GET Parameter Handler. The manipulation of the argument seid leads to sql injection. It is possible to initiate the attack remotely. The exploit has been disclosed publicly 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-2026-5537?
How do I fix CVE-2026-5537?
No fix has been published for CVE-2026-5537 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-5537 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5537 exists.
Sources
Also known as GHSA-8q6m-q7p9-67pr.