CVE-2026-104736: LearnPress (WordPress plugin) · Deserialization of Untrusted Data
Affects LearnPress (WordPress plugin)Source CVE Database V5
Not known to be exploited · public detection template (Nuclei) · CVSS 9.8 Critical.
Data as of 3 Nov 2026, 10:57 UTC
- EPSS
- 2.5% chance of exploitation in 30 days – higher than 84% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 17 Oct 2026
Detectable: evidence found.
nuclei template: LearnPress <= 4.4.9.1 - PHP Object Injection
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| thimpressLearnPress – WordPress LMS Plugin for Create and Sell Online Courses | Affected
| Fixed in– |
AI-suggested
Until a fix is available, avoid exposing the vulnerable checkout AJAX endpoint or restrict access. Monitor vendor channels for updates.
Description
LearnPress WordPress plugin versions up to 4.4.10 are vulnerable to PHP Object Injection via deserialization of untrusted input from the 'checkout-email' parameter during checkout AJAX requests. The plugin improperly unserializes data without restricting allowed classes, enabling unauthenticated attackers to inject malicious PHP objects. This vulnerability has a critical severity with a CVSS score of 9.8.
References
- wordfence.com/threat-intel/vulnerabilities/id/3e28e008-0ec1-4262-9ac0-6170cf8b8bdf?source=cve (opens in a new tab)
- plugins.trac.wordpress.org/browser/learnpress/tags/4.4.9.1/inc/class-lp-session-handler.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/learnpress/tags/4.4.9.1/inc/class-lp-checkout.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/learnpress/tags/4.4.9.1/inc/class-lp-checkout.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/learnpress/tags/4.4.9.1/inc/class-lp-ajax.php (opens in a new tab)
- plugins.trac.wordpress.org/changeset?reponame=&old=3750024%40learnpress&new=3750024%40learnpress (opens in a new tab)