What is the CVSS score of CVE-2025-46550?

CVE-2025-46550 has a CVSS 3.1 base score of 4.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N. EPSS exploitation probability: 0.4%.

Which versions of Yeswiki are affected by CVE-2025-46550?

Organizations using PHP. should be aware of moderate risk from CVE-2025-46550, a cross-site scripting vulnerability rated CVSS 4.3.. A patch is available.

Is there a public PoC exploit available for CVE-2025-46550?

Yes, a public proof-of-concept exploit is available for CVE-2025-46550. Prioritise patching immediately. EPSS: 0.4%.

How to fix or mitigate CVE-2025-46550?

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

Yeswiki CVE-2025-46550

MEDIUM

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

2025-04-29 security-advisories@github.com

XSS Yeswiki

4.3

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.3 MEDIUM

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:39 vuln.today

Patch released

Mar 28, 2026 - 18:39 nvd

Patch available

PoC Detected

May 09, 2025 - 13:59 vuln.today

Public exploit code

CVE Published

Apr 29, 2025 - 21:15 nvd

MEDIUM 4.3

DescriptionGitHub Advisory

YesWiki is a wiki system written in PHP. Prior to version 4.5.4, the /?BazaR endpoint and idformulaire parameter are vulnerable to cross-site scripting. An attacker can use a reflected cross-site scripting attack to steal cookies from an authenticated user by having them click on a malicious link. Stolen cookies allow the attacker to take over the user’s session. This vulnerability may also allow attackers to deface the website or embed malicious content. This issue has been patched in version 4.5.4.

AnalysisAI

YesWiki is a wiki system written in PHP. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. YesWiki is a wiki system written in PHP. Prior to version 4.5.4, the /?BazaR endpoint and idformulaire parameter are vulnerable to cross-site scripting. An attacker can use a reflected cross-site scripting attack to steal cookies from an authenticated user by having them click on a malicious link. Stolen cookies allow the attacker to take over the user’s session. This vulnerability may also allow attackers to deface the website or embed malicious content. This issue has been patched in version 4.5.4. Affected products include: Yeswiki. Version information: version 4.5.4.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.