Vulnerability · Published Apr 5, 2026 · Assigned by VulDB

CVE-2026-5537halex CourseSEL HTTP GET Parameter IndexController.class.php check_sel sql injection

Medium 6.3

In plain English

A medium-severity SQL injection in CourseSEL from halex. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.2%top 83.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
halex	CourseSEL	1.01.1.0

Weakness: CWE-89, CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-355290 | halex CourseSEL HTTP GET Parameter IndexController.class.php check_sel sql injection vdb-entry, technical-description
VDB-355290 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #782202 | halex CourseSEL 1.1.0 SQL Injection third-party-advisory
https://github.com/zy606/Vulnerability-Report/tree/main/CourseSEL-SQLi exploit