The crayon-syntax-highlighter plugin before 2.8.4 for WordPress has multiple XSS issues via AJAX requests.

published 2019-08-20 7 y ago modified 2026-06-17 4 mo ago also EUVD-2016-1887

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits: 0; none known

Patch / fix

fixed in 1 links 2

crayon_syntax_highlighter_project crayon_syntax_highlighter 2.8.4

Exploit prediction

1.52% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

github.com /aramk/crayon-syntax-highlighter/commit/7fdb2e6b4c65178b4ed01ff08a8a38afe5a5151e
product
github.com /aramk/crayon-syntax-highlighter/issues/347
issue-tracking, patch
wordpress.org /plugins/crayon-syntax-highlighter/#developers
release-notes

Sources

CVE List CVE-2016-10893
NVD CVE-2016-10893

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