Cross Site Scripting (XSS) vulnerability exists in Catfish <=6.3.0 via a Google search in url:/catfishcms/index.php/admin/Index/addmenu.htm…

published 2021-12-15 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-31816

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits: 0; none known

Cross Site Scripting (XSS) vulnerability exists in Catfish <=6.3.0 via a Google search in url:/catfishcms/index.php/admin/Index/addmenu.htmland then the .html file on the website that uses this editor (the file suffix is allowed).

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-45018 updated 2025-11-21 cvss 6.1

catfish: xss under specific conditions

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/xwlrbh/Catfish/issues/9 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /xwlrbh/Catfish/issues/9
exploit, issue-tracking, third-party-advisory

Sources

CVE List CVE-2021-45018
NVD CVE-2021-45018

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary