thimpress LearnPress Plugin up to 4.4.0 on WordPress Shortcode /filter-courses/layout sections class_wrapper_form cross site scripting

Summaryinfo

A vulnerability described as problematic has been identified in thimpress LearnPress Plugin up to 4.4.0 on WordPress. Affected by this issue is the function FilterCourseTemplate::sections of the file /filter-courses/layout of the component Shortcode Handler. Such manipulation of the argument class_wrapper_form leads to cross site scripting. This vulnerability is traded as CVE-2026-12732. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in thimpress LearnPress Plugin up to 4.4.0 on WordPress. Affected by this issue is the function FilterCourseTemplate::sections of the file /filter-courses/layout of the component Shortcode Handler. The manipulation of the argument class_wrapper_form with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

The LearnPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'class_wrapper_form' shortcode attribute in versions up to, and including, 4.4.0. This is due to insufficient input sanitization and output escaping in the FilterCourseTemplate::sections() method at line 98, where the attacker-controlled attribute is inserted into an HTML class attribute via sprintf('', $class_wrapper_form) without esc_attr() escaping. The FilterCourseShortcode::render() handler does not apply shortcode_atts() filtering, so raw user attributes flow directly through do_action('learn-press/filter-courses/layout', $data) into the template. 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.

The weakness was shared by zaim and PRISM. The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-12732 since 06/19/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 4.4.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-40934). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• WordPress Plugin

Vendor

• thimpress

Name

• LearnPress Plugin

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4.0

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion