CVE-2025-13899: TR Timthumb <= 1.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

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: 2025-12-06 · updated 2026-10-15
Weakness: CWE-79

Description

The TR Timthumb plugin for WordPress is vulnerable to Stored Cross-Site Scripting via shortcode attributes in all versions up to, and including, 1.0.4 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

pntrinh TR Timthumb: through 1.0.4

References

https://plugins.trac.wordpress.org/browser/tr-timthumb/tags/1.0.4/inc/front.php#L39
https://plugins.trac.wordpress.org/browser/tr-timthumb/trunk/inc/front.php#L39
https://www.wordfence.com/threat-intel/vulnerabilities/id/675bf571-eb8b-4c72-9852-b3a2b37b9a04?source=cve

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