Chameleon CSS <= 1.2 - Subscriber+ SQL Injection

published 2021-11-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11538

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits: 0; none known

The Chameleon CSS WordPress plugin through 1.2 does not have any CSRF and capability checks in all its AJAX calls, allowing any authenticated user, such as subscriber to call them and perform unauthorised actions. One of AJAX call, remove_css, also does not sanitise or escape the css_id POST parameter before using it in a SQL statement, leading to a SQL Injection

Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

wpscan.com https://wpscan.com/vulnerability/06cb6c14-99b8-45b6-be2e-f4dcca8a4165 referenced PoC, tagged "exploit" by a source, unverified
codevigilant.com https://codevigilant.com/disclosure/2021/wp-plugin-chameleon-css/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

Unknown Chameleon CSS

Classification

Weakness

CWE-89 Improper Neutralization of Special Elements used in an SQL Command
CWE-352 Cross-Site Request Forgery

Technology feeds

WordPress rss critical rss

References

wpscan.com /vulnerability/06cb6c14-99b8-45b6-be2e-f4dcca8a4165
exploit, third-party-advisory
codevigilant.com /disclosure/2021/wp-plugin-chameleon-css/
exploit, third-party-advisory

Sources

CVE List CVE-2021-24626
NVD CVE-2021-24626

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