YMC Filter Plugin up to 3.12.19 on WordPress Autocomplete REST Endpoint post_title cross site scripting

Summaryinfo

A vulnerability labeled as problematic has been found in YMC Filter Plugin up to 3.12.19. This vulnerability affects unknown code of the component Autocomplete REST Endpoint. The manipulation of the argument post_title results in cross site scripting. This vulnerability was named CVE-2026-109983. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic has been found in YMC Filter Plugin up to 3.12.19. Affected is an unknown part of the component Autocomplete REST Endpoint. The manipulation of the argument post_title 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 YMC Filter plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'post_title' parameter in all versions up to, and including, 3.12.19 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The autocomplete REST endpoint is registered with a permission callback that unconditionally returns true, meaning any site visitor — including unauthenticated users — can trigger the payload simply by typing in the YMC filter search box, while only Author-level access is required to store it.

The advisory is available at wordfence.com. This vulnerability is traded as CVE-2026-109983 since 10/13/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-103276). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• WordPress Plugin

Name

• YMC Filter Plugin

Version

• 3.12.0
• 3.12.1
• 3.12.2
• 3.12.3
• 3.12.4
• 3.12.5
• 3.12.6
• 3.12.7
• 3.12.8
• 3.12.9
• 3.12.10
• 3.12.11
• 3.12.12
• 3.12.13
• 3.12.14
• 3.12.15
• 3.12.16
• 3.12.17
• 3.12.18
• 3.12.19

CPE 2.3info

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CPE 2.2info

• 🔒
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• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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