sherkspear Sherk Custom Post Type Displays Plugin up to 1.2.1 on WordPress Shortcode SherkCPTDisplaysShortcode.php sherkcptdisplays_func sherkcptdisplays cross site scripting

Summaryinfo

A vulnerability described as problematic has been identified in sherkspear Sherk Custom Post Type Displays Plugin up to 1.2.1 on WordPress. This issue affects the function sherkcptdisplays_func of the file includes/SherkCPTDisplaysShortcode.php of the component Shortcode Handler. The manipulation of the argument sherkcptdisplays results in cross site scripting. This vulnerability is cataloged as CVE-2026-3554. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in sherkspear Sherk Custom Post Type Displays Plugin up to 1.2.1 on WordPress. Affected is the function sherkcptdisplays_func of the file includes/SherkCPTDisplaysShortcode.php of the component Shortcode Handler. The manipulation of the argument sherkcptdisplays 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. CVE summarizes:

The Sherk Custom Post Type Displays plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'title' shortcode attribute in all versions up to, and including, 1.2.1. This is due to insufficient input sanitization and output escaping on the 'title' attribute of the 'sherkcptdisplays' shortcode. Specifically, in the sherkcptdisplays_func() function in includes/SherkCPTDisplaysShortcode.php, the 'title' attribute value is extracted from shortcode_atts() on line 19 and directly concatenated into an HTML tag on line 31 without any 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.

The weakness was shared by Youcef Hamdani. The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-3554 since 03/04/2026. The exploitability is told to be easy. It is possible to launch the attack 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.

By approaching the search of inurl:includes/SherkCPTDisplaysShortcode.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.2.1 eliminates this vulnerability.

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Productinfo

Type

• WordPress Plugin

Vendor

• sherkspear

Name

• Sherk Custom Post Type Displays Plugin

Version

• 1.2.0
• 1.2.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

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• 🔒

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