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CVE-2025-4587: A/B Testing for WordPress <= 1.18.2 - Authenticated (Contributor+) Stored Cross-Site Scripting

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-27 · updated 2026-06-17
• Weakness: CWE-79

Description

The A/B Testing for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'ab-testing-for-wp/ab-test-block' block in all versions up to, and including, 1.18.2 due to insufficient input sanitization and output escaping on the 'id' parameter. 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

• johnjamesjacoby A/B Testing for WordPress: through 1.18.2

References

• https://wordpress.org/plugins/ab-testing-for-wp/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/3dcf401a-3b91-4b55-b6b1-a132ec195607?source=cve

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