CVE-2026-6708: Auth Bypass (CVSS 5.3)

Description

The HEL Online Classroom: AI-powered Online Classrooms plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 1.0.3. This is due to a missing capability check on a REST API endpoint registered with a permission_callback of '__return_true', which bypasses all WordPress authentication and authorization checks. This makes it possible for unauthenticated attackers to delete any classroom record by supplying its ID in the request, resulting in permanent data loss.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.43%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-862 Missing Authorization

References

Other References

https://plugins.trac.wordpress.org/browser/hel-online-classroom/tags/1.0.3/hel-online-classroom.php#L398 https://plugins.trac.wordpress.org/browser/hel-online-classroom/tags/1.0.3/hel-online-classroom.php#L605 https://plugins.trac.wordpress.org/browser/hel-online-classroom/trunk/hel-online-classroom.php#L398 https://plugins.trac.wordpress.org/browser/hel-online-classroom/trunk/hel-online-classroom.php#L605 https://www.wordfence.com/threat-intel/vulnerabilities/id/0612c0be-f1c0-4f74-a769-e4616f103ee6?source=cve

Frequently Asked Questions

What is CVE-2026-6708? +

The HEL Online Classroom: AI-powered Online Classrooms plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 1.0.3. This is due to a missing capability check on a REST API endpoint registered with a permission_callback of '__return_true', which bypasses all WordPress authentication and authorization checks. This makes it possible for unauthenticated attackers to delete any classroom record by supplying its ID in the request, resulting in permanent data loss. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-6708? +

CVE-2026-6708 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0021, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-6708? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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