How to fix CVE-2025-66561?

Within 24 hours: Identify all SysReptor instances and document current versions. Within 7 days: Upgrade all SysReptor deployments to version 2025.102 or later; test file upload restrictions in staging environment before production deployment. Within 30 days: Conduct audit of file uploads from past 90 days and review access logs for suspicious JavaScript file uploads; implement additional input validation on uploaded files.

Is Sysreptor affected by CVE-2025-66561?

SysReptor versions prior to 2025.102 contain a stored XSS vulnerability that allows authenticated users to inject malicious JavaScript affecting other users of the pentest reporting platform, potentially compromising report integrity and user sessions.

CVE-2025-66561

EUVD-2025-201321 HIGH

2025-12-04 [email protected]

XSS Sysreptor

7.3

CVSS 3.1

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 06:23 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

patch_available

Apr 16, 2026 - 05:29 EUVD

2025.102

EUVD ID Assigned

Mar 15, 2026 - 16:35 euvd

EUVD-2025-201321

Analysis Generated

Mar 15, 2026 - 16:35 vuln.today

CVE Published

Dec 04, 2025 - 23:15 nvd

HIGH 7.3

DescriptionNVD

SysReptor is a fully customizable pentest reporting platform. Prior to 2025.102, there is a Stored Cross-Site Scripting (XSS) vulnerability allows authenticated users to execute malicious JavaScript in the context of other logged-in users by uploading malicious JavaScript files in the web UI. This vulnerability is fixed in 2025.102.

AnalysisAI

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

Encode all user-supplied output contextually (HTML, JS, URL). Implement Content Security Policy (CSP) headers. Use HTTPOnly and Secure cookie flags.

CVE-2025-66561 vulnerability details – vuln.today

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