cvmh Sticky Plugin up to 2.5.6 on WordPress Shortcode cvmh_sticky_front_render readmoretext cross site scripting

Summaryinfo

A vulnerability has been found in cvmh Sticky Plugin up to 2.5.6 on WordPress and classified as problematic. This affects the function cvmh_sticky_front_render of the component Shortcode Handler. Performing a manipulation of the argument readmoretext results in cross site scripting. This vulnerability was named CVE-2026-6397. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in cvmh Sticky Plugin up to 2.5.6 on WordPress. This affects the function cvmh_sticky_front_render of the component Shortcode Handler. The manipulation of the argument readmoretext with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. The summary by CVE is:

The Sticky plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `cvmh-sticky` shortcode `readmoretext` attribute in versions up to and including 2.5.6. This is due to insufficient input sanitization and output escaping in the `cvmh_sticky_front_render()` function — the `readmoretext` attribute value is passed through `apply_filters()` and directly concatenated into the HTML output without any escaping function such as `esc_html()`. 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 a page containing the injected shortcode.

The weakness was presented by Djaidja Moundjid. The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-6397 since 04/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 2.5.6 eliminates this vulnerability.

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Productinfo

Type

• WordPress Plugin

Vendor

• cvmh

Name

• Sticky Plugin

Version

• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4
• 2.5.5
• 2.5.6

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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