What is CVE-2025-5537?

CVE-2025-5537 is a medium-severity vulnerability in Fooplugins Foobox, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2025-07-08.

How severe is CVE-2025-5537?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Fooplugins Foobox

CVE-2025-5537

The Lightbox & Modal Popup WordPress Plugin – FooBox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via image alternative texts in all versions up to, and including, 2.7.34 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (7.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Fooplugins Foobox
Fooplugins Lightbox & Modal Popup Wordpress Plugin – Foobox — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@wordfence.com (Third Party Advisory)
security@wordfence.com (Patch)

Frequently asked questions

What is CVE-2025-5537?: CVE-2025-5537 is a medium-severity vulnerability in Fooplugins Foobox, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2025-07-08.
How severe is CVE-2025-5537?: Medium severity. CVSS v3 base score is 6.4 out of 10.