Yeswiki Path Traversal vulnerability allows arbitrary read of files

Exploitation

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

CVSS

8.6 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

EPSS

• CVE-2025-31131: 5.58% estimated exploitation activity in the next 30 days; percentile 92.90 (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 The squelette parameter is vulnerable to path traversal attacks, enabling read access to arbitrary files on the server. The payload ../../../../../../etc/passwd was submitted in the squelette parameter. The requested file was returned in the application's response. Details File path traversal vulnerabilities arise when user-controllable data is used within a filesystem operation in an unsafe manner. Typically, a user-supplied filename is appended to a directory prefix in order to read or write the contents of a file. If vulnerable, an attacker can supply path traversal sequences (using dot-dot-slash characters) to break out of the intended directory and read or write files elsewhere on the filesystem. PoC 1. Access the below URL to see the contents of /etc/passwd: URL with payload: https://yeswiki.net/?UrkCEO/edit&theme=margot&squelette=..%2f..%2f..%2f..%2f..%2f..%2fetc%2fpasswd&style=margot.css Similarly, contents of wakka.config.php can be read (which contains database…

Published by the source

1 Apr 2025, 18:31 UTC

Last modified by the source

1 Apr 2025, 18:31 UTC

Source last checked

26 Oct 2026, 14:30 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-w34w-fvp3-68xm

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# Patch Next advisory brief: CVE-2025-31131

Advisory: Yeswiki Path Traversal vulnerability allows arbitrary read of files
IDs: CVE-2025-31131, GHSA-w34w-fvp3-68xm
Record: https://patchnext.com/advisories/cve-2025-31131 (revision 1, source checked 26 Oct 2026, 14:30 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: yeswiki/yeswiki 4.5.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist yeswiki/yeswiki: affected < 4.5.2; fixed in 4.5.2

## 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-w34w-fvp3-68xm (GitHub-reviewed advisory GHSA-w34w-fvp3-68xm lists affected ranges: Packagist yeswiki/yeswiki >=0 <4.5.2)

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