What is the CVSS score of EUVD-2025-18910?

EUVD-2025-18910 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Cryptpad are affected by EUVD-2025-18910?

Organizations using CryptPad should be aware of moderate risk from CVE-2025-49590 rated CVSS 6.1. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for EUVD-2025-18910?

Yes, a public proof-of-concept exploit is available for EUVD-2025-18910. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate EUVD-2025-18910?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Cryptpad EUVD-2025-18910

| CVE-2025-49590 MEDIUM

Incomplete Denylist to Cross-Site Scripting (CWE-692)

2025-06-18 security-advisories@github.com

XSS Cryptpad

6.1

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

EUVD ID Assigned

Mar 14, 2026 - 22:49 euvd

EUVD-2025-18910

Analysis Generated

Mar 14, 2026 - 22:49 vuln.today

Patch released

Mar 14, 2026 - 22:49 nvd

Patch available

PoC Detected

Aug 11, 2025 - 18:18 vuln.today

Public exploit code

CVE Published

Jun 18, 2025 - 23:15 nvd

MEDIUM 6.1

DescriptionGitHub Advisory

CryptPad is a collaboration suite. Prior to version 2025.3.0, the "Link Bouncer" functionality attempts to filter javascript URIs to prevent Cross-Site Scripting (XSS), however this can be bypassed. There is an "early allow" code path that happens before the URI's protocol/scheme is checked, which a maliciously crafted URI can follow. This issue has been patched in version 2025.3.0.

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.

EUVD-2025-18910 vulnerability details – vuln.today

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