CVE-2021-24591

MEDIUM 5.4CVE-2021-24591 · Published 06/09/2021 · updated 17/06/2026

In short

CVE-2021-24591 is a MEDIUM (CVSS 5.4) vulnerability affecting highlight (dna88).
Chance of exploitation in the next 30 days (EPSS): 0.62%, higher than 50.2% of all vulnerabilities.
Fix: update to 0.9.3 or later.

Package	Affected versions	Patched versions
highlight dna88	`< 0.9.3`	`0.9.3`

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

References

wpscan.com/vulnerability/c5cbe3b4-2829-4fd2-8194-4b3a2ae0e257 · Exploit

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