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Crayon Syntax Highlighter 2.0 — 2.6.10 - Missing Authorization

6cd49c60-e845-4dbb-b6b1-bd59aa1bb3baPublished · Updated

Action summary

Affected: 2.0 – 2.6.10Update to 2.7.0 or newer

All remediation steps
Watch plugin
Severity
Medium5.4
CVSS
5.4
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:L Privileges required
Low
UI:N User interaction
None
S:U Scope
Unchanged
C:N Confidentiality
None
I:L Integrity
Low
A:L Availability
Low
Weakness
CWE-862 Missing Authorization
Required access
Unknown
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Crayon Syntax Highlighter crayon-syntax-highlighter

  1. Affected2.0 – 2.6.10
  2. Patched in2.7.0

Update to 2.7.0 or newer.

You are affected if you run 2.0 – 2.6.10. Version 2.7.0 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Crayon Syntax Highlighter.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 2.7.0, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Crayon Syntax Highlighter to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to James Hooker.

The Crayon Syntax Highlighter Plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the crayon-theme-editor-save AJAX action in versions 2.0 - 2.6.10. This makes it possible for authenticated attackers, with subscriber-level permissions and above, to overwrite theme files.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Crayon Syntax Highlighter

All 6
More vulnerabilities in Crayon Syntax Highlighter
SeverityVulnerabilityCVEPublished
Medium6.4Authenticated (Contributor+) Server Side Request Forgery
≤2.8.4No patch available
CVE-2023-4893
High8.8Cross-Site Request Forgery
≤2.8.4No patch available
CVE-2022-47167
Medium6.1Cross-Site Scripting
<2.8.4Update to 2.8.4
CVE-2016-10893
Medium6.5Directory Traversal
<2.7.0Update to 2.7.0
—
Critical9.8Remote File Inclusion
≤1.13Update to 1.14
—

Same weakness (Missing Authorization)

All Missing Authorization
Other Missing Authorization vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity medium, CVSS 5.4

  2. Record last updated

Sources & licenses

Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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