CodeColorer <= 0.10.1 - Unauthenticated Stored Cross-Site Scripting via 'class' attribute in 'cc' Comment Shortcode
Strategic Overview
- Status
- Patched in 0.10.2
- Affected Plugin
- CodeColorer
- Affected Version
<= 0.10.1- CVSS
- 6.1Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2026-4032
At a glance
CVE-2026-4032 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the CodeColorer WordPress plugin, affecting versions <= 0.10.1. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 0.10.2; sites on affected versions should update now. Disclosed April 2026, reported by Chawabhon Netisingha (JNX03).
Vulnerability Overview
The CodeColorer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'class' parameter in 'cc' comment shortcode in versions up to, and including, 0.10.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires comments to be enabled on the target post and guest comments to be allowed.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CodeColorer <= 0.10.1 carries this weakness at class, and reaching it takes no account at all. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.
Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For CodeColorer the fix is 0.10.2: builds <= 0.10.1 are affected, anything from 0.10.2 onward is not.
Remediation
Update to version 0.10.2, or a newer patched version
How does WordSec protect against this?
Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: CodeColorer 0.10.2 closes this, and updating the plugin is the step that ends it.
- Firewall
- Login Security
- Alerts
External References
Related records
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