CVE-2026-2986: Contextual Related Posts <= 4.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'other_attributes'

Severity: medium (CVSS 6.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-18 · updated 2026-06-17
Weakness: CWE-79

Description

The Contextual Related Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'other_attributes' parameter in versions up to, and including, 4.2.1 due to insufficient input sanitization and output 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.

Affected products

ajay Contextual Related Posts: through 4.2.1

References

https://plugins.trac.wordpress.org/changeset/3481684/contextual-related-posts
https://www.wordfence.com/threat-intel/vulnerabilities/id/8f59e069-a953-47b6-8106-55f55df722ed?source=cve

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