CVE-2025-13617: APOLLO13THEMES APOLLO13 Framework Extensions

Medium severity, CVSS 6.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Apollo13 Framework Extensions plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘a13_alt_link’ parameter in all versions up to, and including, 1.9.8 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

• APOLLO13THEMES APOLLO13 Framework Extensions: up to and including 1.9.8

Published 2026-02-19. Last modified 2026-06-17.