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CVE-2026-2505: Categories Images <= 3.3.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'z_taxonomy_image' Shortcode

• Severity: medium (CVSS 5.4 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: 2026-04-18 · updated 2026-06-17
• Weakness: CWE-79

Description

The Categories Images plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 3.3.1, via the 'z_taxonomy_image' shortcode. This is due to the shortcode rendering path passing attacker-controlled class input into a fallback image builder that concatenates HTML attributes without proper escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts that execute when users interact with the injected frontend page via the 'class' shortcode attribute.

Affected products

• elzahlan Categories Images: through 3.3.1

References

• https://plugins.trac.wordpress.org/changeset/3499275/categories-images
• https://www.wordfence.com/threat-intel/vulnerabilities/id/34fb64d5-e152-4950-9ef4-6d53a97a56fb?source=cve

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