XSS in Thimpress Learnpress
CVE-2026-105397
LearnPress plugin for WordPress through 4.4.9.1 contains a stored cross-site scripting vulnerability that allows authenticated instructors to inject scripts via quiz question hint and explanation fields. Attackers with the Instructor role can submit unsanitized payloads through the update_question AJAX handler that execute in the session of every student taking the quiz.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/LearnPress/learnpress/commit/9db279c0d9fd3993430bb9af158658282e9bcee1 (patch)
- plugins.svn.wordpress.org/learnpress/tags/4.4.9.1/inc/Ajax/EditQuestionAjax.php (technical-description)
- plugins.svn.wordpress.org/learnpress/tags/4.4.9.1/assets/src/apps/js/frontend/q… (technical-description)
- wordpress.org/plugins/learnpress/ (product)
- www.vulncheck.com/advisories/learnpress-wordpress-plugin-through-4.4.9.1-stored… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-105397?
- CVE-2026-105397 is a medium-severity vulnerability in Thimpress Learnpress, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-10-05.
- How severe is CVE-2026-105397?
- Medium severity. CVSS v3 base score is 5.4 out of 10.