Yeswiki Vulnerable to Unauthenticated Reflected Cross-site Scripting

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS

• CVE-2025-46549: 0.55% estimated exploitation activity in the next 30 days; percentile 46.11 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

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: <scriptalert(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…

Published by the source

29 Apr 2025, 14:35 UTC

Last modified by the source

30 Apr 2025, 17:26 UTC

Source last checked

26 Oct 2026, 14:33 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-r9gv-qffm-xw6f

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# Patch Next advisory brief: CVE-2025-46549

Advisory: Yeswiki Vulnerable to Unauthenticated Reflected Cross-site Scripting
IDs: CVE-2025-46549, GHSA-r9gv-qffm-xw6f
Record: https://patchnext.com/advisories/cve-2025-46549 (revision 1, source checked 26 Oct 2026, 14:33 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: yeswiki/yeswiki 4.5.4. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist yeswiki/yeswiki: affected <= 4.5.3; fixed in 4.5.4

## Suggested inspection (read-only)
- Packagist yeswiki/yeswiki: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on yeswiki/yeswiki.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-r9gv-qffm-xw6f (GitHub-reviewed advisory GHSA-r9gv-qffm-xw6f lists affected ranges: Packagist yeswiki/yeswiki >=0 <=4.5.3)

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