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Fencer Intel
high 8.8

CVE-2021-24626 json

Chameleon CSS <= 1.2 - Subscriber+ SQL Injection

published 5y ago modified 4mo 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

Summary

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

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Exploit prediction

0.74% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-09).

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

References

Sources

Fencer Intel 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.