XSS in Foxcms

CVE-2025-55422

In FoxCMS 1.2.6, there is a reflected Cross Site Scripting (XSS) vulnerability in /index.php/plus.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (33.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-55422: held from 0.004 to 0.004.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-55422?
CVE-2025-55422 is a high-severity vulnerability in Foxcms, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2025-08-27.
How severe is CVE-2025-55422?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2025-55422 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.