How to fix CVE-2025-53500?

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

Is Masseditregex affected by CVE-2025-53500?

CVE-2025-53500 presents moderate security risk, a cross-site scripting vulnerability rated CVSS 5.6. Attackers could inject scripts to steal sessions or perform actions as authenticated users. Proof-of-concept code is publicly available.

Masseditregex CVE-2025-53500

EUVD-2025-19887 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-07-03 c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

XSS Masseditregex

5.6

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 16, 2026 - 02:12 vuln.today

EUVD ID Assigned

Mar 16, 2026 - 02:12 euvd

EUVD-2025-19887

Patch released

Mar 16, 2026 - 02:12 nvd

Patch available

PoC Detected

Sep 30, 2025 - 20:26 vuln.today

Public exploit code

CVE Published

Jul 03, 2025 - 17:15 nvd

MEDIUM 5.6

DescriptionNVD

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - MassEditRegex Extension allows Stored XSS.This issue affects Mediawiki - MassEditRegex Extension: from 1.39.X before 1.39.12, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.

Analysis

Technical ContextAI

Cross-site scripting (XSS) allows injection of client-side scripts into web pages viewed by other users due to insufficient output encoding.

RemediationAI

A vendor patch is available — apply it immediately. Encode all user-supplied output contextually (HTML, JS, URL). Implement Content Security Policy (CSP) headers. Use HTTPOnly and Secure cookie flags.

CVE-2025-53500 vulnerability details – vuln.today

Back