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CVE-2021-24591

MEDIUM 5.4 CVSS 3.1
Published
September 6, 2021
Last modified
June 17, 2026
NVD status
Modified
Reported by
contact@wpscan.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Description

The Highlight WordPress plugin before 0.9.3 does not sanitise its CustomCSS setting, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed

Affected WordPress components

  • Highlight Sitewide Notice, Text, Button Menu Plugin · highlight
    Possible match Active
    From 0.9.3 (including) to 0.9.3 (excluding); Before 0.9.3
    View on WordPress.org
  • Highlight Theme · highlight
    Possible match Active
    From 0.9.3 (including) to 0.9.3 (excluding); Before 0.9.3
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Unknown Highlight — From 0.9.3 (including) to 0.9.3 (excluding)
  • dna88 highlight — Before 0.9.3

References

  • wpscan.com https://wpscan.com/vulnerability/c5cbe3b4-2829-4fd2-8194-4b3a2ae0e257 Exploit, Third Party Advisory
  • nvd.nist.gov Official NVD record