GIVE YOUR AGENT THE EVIDENCE

Set up in your agent.

One prompt to get started. Paste it into your coding agent to connect cve.new through MCP and bring vulnerability context into your workflow.

Your agent needs remote MCP support and access to https://cve.new/mcp.

Read the setup guide

GIVE YOUR AGENT THE EVIDENCE

Investigate in your agent.

Turn this advisory into a focused investigation. Ask your agent to check your project’s versions, explain the evidence, and suggest a compatible fix.

Your agent needs remote MCP support and access to https://cve.new/mcp.

Read the setup guide

cve.new
Check your stack
GHSA-r9gv-qffm-xw6fmedium5.3

Yeswiki Vulnerable to Unauthenticated Reflected Cross-site Scripting

Impact

Vulnerable Version: Yeswiki alert(1)

Source excerpt · OSV

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

yeswiki/yeswiki Packagist
Affected rangeRecorded fix
Earlier releases before 4.5.4Ecosystem versions4.5.4

Version evidence: OSV · GHSA-r9gv-qffm-xw6f

View original version evidence (23 explicit versions)

Original source description

Summary

Vulnerable Version: Yeswiki < v4.5.4 Category: Injection CWE: 79: Improper Neutralization of Input During Web Page Generation (CWE-79) CVSS: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N) Vulnerable Endpoint: /?BazaR/bazariframe Vulnerable Parameter: template Payload: <script>alert(1)</script>

Details

Reflected Cross-Site Scripting (XSS) attacks are a type of injection, in which malicious scripts are injected into otherwise benign and trusted websites. XSS attacks occur when an attacker uses a web application to send malicious code, generally in the form of a browser-side script, to a different end user. Flaws that allow these attacks to succeed are quite widespread and occur anywhere a web application uses input from a user within the output it generates without validating or encoding it.

PoC

  1. Visit the endpoint as mentioned below and see that an alert box pops up: URL with Payload: https://yeswiki.net/?BazaR/bazariframe&id=2&template=%3cscript%3ealert(1)%3c%2fscript%3e

Impact

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.

References