CVE-2026-4333 json
LearnPress <= 4.3.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'skin' Shortcode Attribute
published 2026-04-08 7 mo ago modified 2026-07-24 3 mo ago also EUVD-2026-20045
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
The LearnPress – WordPress LMS Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'skin' attribute of the learn_press_courses shortcode in all versions up to and including 4.3.3. This is due to insufficient input sanitization and output escaping on the 'skin' shortcode attribute. The attribute value is used directly in an sprintf() call that generates HTML (class attribute and data-layout attribute) without any esc_attr() escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- thimpress LearnPress – WordPress LMS Plugin for Create and Sell Online Courses
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/15fb0a26-e415-4ccb-b83d-d8f7b36bce66?source=cve
- plugins.trac.wordpress.org /browser/learnpress/trunk/inc/Shortcodes/Courses/ListCoursesShortcode.php#L76
- plugins.trac.wordpress.org /browser/learnpress/tags/4.3.2.8/inc/Shortcodes/Courses/ListCoursesShortcode.php#L76
- plugins.trac.wordpress.org /browser/learnpress/trunk/inc/Shortcodes/Courses/ListCoursesShortcode.php#L55
- plugins.trac.wordpress.org /browser/learnpress/tags/4.3.2.8/inc/Shortcodes/Courses/ListCoursesShortcode.php#L55
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&old=3494377%40learnpress&new=3494377%40learnpress&sfp_email=&sfph_m
Sources
- CVE List CVE-2026-4333
- NVD CVE-2026-4333
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.