CVE-2026-29840

| EUVD-2026-14905 MEDIUM
2026-03-24 mitre GHSA-ffqv-44jp-mf9x
5.4
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 24, 2026 - 16:00 vuln.today
EUVD ID Assigned
Mar 24, 2026 - 16:00 euvd
EUVD-2026-14905
CVE Published
Mar 24, 2026 - 00:00 nvd
MEDIUM 5.4

Description

JiZhiCMS v2.5.6 and before contains a Stored Cross-Site Scripting (XSS) vulnerability in the release function within app/home/c/UserController.php. The application attempts to sanitize input by filtering <script> tags but fails to recursively remove dangerous event handlers in other HTML tags (such as onerror in <img> tags). This allows an authenticated remote attacker to inject arbitrary web script or HTML via the body parameter in a POST request to /user/release.html.

Analysis

JiZhiCMS v2.5.6 and earlier contains a stored cross-site scripting (XSS) vulnerability in the user release function that allows authenticated attackers to inject malicious scripts through improper HTML sanitization. The vulnerability exists because the application filters <script> tags but fails to recursively remove dangerous event handlers (such as onerror) from other HTML elements like <img> tags, enabling persistent XSS attacks. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

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Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +27
POC: 0

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CVE-2026-29840 vulnerability details – vuln.today

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