CVE-2021-24626: The Chameleon CSS WordPress plugin through 1.2 does not have any CSRF and capability checks in all its AJAX ca

Q: How do I fix CVE-2021-24626?

chameleon css: upgrade to newer than 1.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-24626 being exploited?

CVE-2021-24626 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-24626 affect?

CVE-2021-24626 affects chameleon css. Severity is high (CVSS 8.8). 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_c

Q: How urgent is CVE-2021-24626?

Priority 49/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2021-24626 is a high-severity flaw (CVSS 8.8) affecting chameleon css. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-89, CWE-352
Published	2021-11-08
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: chameleon css project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-11-08 18:15 UTCPublished CVE record published
2026-06-17 03:40 UTCUpdated Record last modified

chameleon css project chameleon css UPGRADE

Affected: <= 1.2

Fixed in: newer than 1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy chameleon-css || rpm -q chameleon-css || chameleon-css --version

2. UPGRADE to newer than 1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade chameleon-css

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade chameleon-css

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-24626?

chameleon css: upgrade to newer than 1.2. Exact commands for each OS are on this page.

Is CVE-2021-24626 being exploited?

CVE-2021-24626 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-24626 affect?

CVE-2021-24626 affects chameleon css. Severity is high (CVSS 8.8). 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_c

How urgent is CVE-2021-24626?

Priority 49/100. High severity; Public exploit reference

Software pages

WordPress vulnerabilities

References

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