CVE-2026-18579 WP Photo Album Plus <= 9.2.08.003 - Unauthenticated Stored Cross-Site Scripting
Unauthenticated attackers can inject arbitrary scripts via the X-Forwarded-For header in WP Photo Album Plus, leading to stored XSS execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18579?
CVE-2026-18579 is a high-severity cross-site scripting vulnerability in opajaap WP Photo Album Plus, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The WP Photo Album Plus plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'HTTP_X_FORWARDED_FOR' parameter in all versions up to, and including, 9.2.08.003 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The nonce failure path for the getshortcodedrenderedfenodelay action serves as the log-write trigger rather than an access barrier — a deliberately failed nonce check causes wppa_log() to record the attacker-supplied X-Forwarded-For value to disk, making the exploit fully reachable by unauthenticated callers via the wp_ajax_nopriv_wppa endpoint.
Weakness: CWE-79
Which versions are affected by CVE-2026-18579?
How do I fix CVE-2026-18579?
No fix has been published for CVE-2026-18579 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-18579 being exploited?
There is no known exploitation of CVE-2026-18579 in the wild and no public exploit code.
Sources
Also known as GHSA-5mj5-4x3x-pjmq.