CVE-2025-70129: Pluxml

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

If the anti spam-captcha functionality in PluXml versions 5.8.22 and earlier is enabled, a captcha challenge is generated with a format that can be automatically recognized for articles, such that an automated script is able to solve this anti-spam mechanism trivially and publish spam comments. The details of captcha challenge are exposed within document body of articles with comments & anti spam-captcha functionalities enabled, including "capcha-letter", "capcha-word" and "capcha-token" which can be used to construct a valid post request to publish a comment. As such, attackers can flood articles with automated spam comments, especially if there are no other web defenses available.

Affected products

• Pluxml Pluxml: up to and including 5.8.22

Published 2026-03-10. Last modified 2026-06-17.