Molongui Authorship Plugin up to 5.2.12 on WordPress Author-Filter Rewriter Plugin::has_pro comment cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, was found in Molongui Authorship Plugin up to 5.2.12. This vulnerability affects the function Plugin::has_pro of the component Author-Filter Rewriter. The manipulation of the argument Comment results in cross site scripting. This vulnerability is identified as CVE-2026-101920. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Molongui Authorship Plugin up to 5.2.12. It has been classified as problematic. Affected is the function Plugin::has_pro of the component Author-Filter Rewriter. The manipulation of the argument comment 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 Molongui Authorship – Author Boxes, Guest Authors & Co-Authors for WordPress plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'comment (href attribute inside comment content)' parameter in all versions up to, and including, 5.2.12 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 is exploitable in the free build because the plugin's author-filter rewriter never appends the ?m_bm=true marker to its own anchors (Plugin::has_pro() returns false), meaning every href the byline script selects and rewrites is fully attacker-controlled.

The advisory is available at wordfence.com. This vulnerability is traded as CVE-2026-101920 since 09/28/2026. 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.

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Productinfo

Type

• WordPress Plugin

Vendor

• Molongui

Name

• Authorship Plugin

Version

• 5.2.0
• 5.2.1
• 5.2.2
• 5.2.3
• 5.2.4
• 5.2.5
• 5.2.6
• 5.2.7
• 5.2.8
• 5.2.9
• 5.2.10
• 5.2.11
• 5.2.12

CPE 2.3info

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CPE 2.2info

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• 🔒

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