CVE-2026-6397 — Cross-Site Scripting (XSS)
CVE-2026-6397 — The Sticky plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `cvmh-sticky` shortcode `readmoretext` attribute in versions up to and including 2.5.6. This is due to insufficient input sanitization and output escaping in the `cvmh_sticky_front_render()` function
What This Means For You
- If your environment is affected by CWE-79, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-6397 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-6397 - WordPress Sticky Plugin Stored XSS via readmoretext
title: CVE-2026-6397 - WordPress Sticky Plugin Stored XSS via readmoretext
id: scw-2026-05-20-ai-1
status: experimental
level: medium
description: |
Detects requests targeting the Sticky plugin in WordPress that include the 'cvmh-sticky' shortcode with the 'readmoretext' parameter, indicative of a potential Stored Cross-Site Scripting (XSS) attempt as described in CVE-2026-6397. This rule specifically looks for the vulnerable shortcode and attribute, which are concatenated directly into HTML without proper sanitization.
author: SCW Feed Engine (AI-generated)
date: 2026-05-20
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-6397/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/wp-content/plugins/sticky/'
cs-uri-query|contains:
- 'cvmh-sticky'
cs-uri-query|contains:
- 'readmoretext='
condition: cs-uri AND cs-uri-query
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-6397 | vulnerability | CVE-2026-6397 |
| CWE-79 | weakness | CWE-79 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 20, 2026 at 05:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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