What is CVE-2023-4893?

CVE-2023-4893 is a medium-severity vulnerability in Akarmenia Crayon Syntax Highlighter, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.4/10. Published 2023-09-12.

How severe is CVE-2023-4893?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Is CVE-2023-4893 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SSRF in Akarmenia Crayon Syntax Highlighter

CVE-2023-4893

The Crayon Syntax Highlighter plugin for WordPress is vulnerable to Server Side Request Forgery via the 'crayon' shortcode in versions up to, and including, 2.8.4. This can allow authenticated attackers with contributor-level permissions or above to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2023-09-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (30.3th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Akarmenia Crayon Syntax Highlighter — versions 0
Aramk Crayon-Syntax-Highlighter

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Public proof-of-concept exploits

20142995/nuclei-templates

References

www.wordfence.com/threat-intel/vulnerabilities/id/527f75f1-6361-4e16-8ae4-d38ca… (Third Party Advisory)
plugins.trac.wordpress.org/browser/crayon-syntax-highlighter/trunk/crayon_highl… (Broken Link)

Frequently asked questions

What is CVE-2023-4893?: CVE-2023-4893 is a medium-severity vulnerability in Akarmenia Crayon Syntax Highlighter, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.4/10. Published 2023-09-12.
How severe is CVE-2023-4893?: Medium severity. CVSS v3 base score is 6.4 out of 10.
Is CVE-2023-4893 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.