ThirstyAffiliates Plugin up to 3.12.1 on WordPress Comment Content comment cross site scripting

Summaryinfo

A vulnerability has been found in ThirstyAffiliates Plugin up to 3.12.1 and classified as problematic. This vulnerability affects unknown code of the component Comment Content. The manipulation of the argument Comment leads to cross site scripting. This vulnerability is traded as CVE-2026-119089. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in ThirstyAffiliates Plugin up to 3.12.1. This issue affects an unknown part of the component Comment Content. The manipulation of the argument comment 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. The summary by CVE is:

The ThirstyAffiliates – Affiliate Links, Link Branding, Link Tracking & Marketing Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 3.12.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is only exploitable on block themes (such as Twenty Twenty-Five) where the Comment Content block causes comment HTML to flow through render_block, triggering the plugin's transformer. Additionally, a successful attack requires the attacker to have had one prior comment approved, after which subsequent crafted comments are auto-approved and rendered publicly.

The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2026-119089 since 10/29/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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.

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

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Productinfo

Type

• WordPress Plugin

Name

• ThirstyAffiliates Plugin

Version

• 3.12.0
• 3.12.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

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• 🔒

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