CVE-2025-31131

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 password) using ..%2f..%2f..%2fwakka.config.php as payload. Thus showing the severity of this issue.

This is a very serious vulnerability, allowing an attacker to access sensitive files containing configuration data, passwords, database records, log data, source code, and program scripts and binaries. Thus, leading to complete loss of confidentiality.

Input manipulates file paths to reach files outside the intended directory, such as configuration or credential files. Typical impact: unauthorized file read or write outside the intended directory.

CVE-2025-31131 has a CVSS score of 8.6 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (4.5.2); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is CVE-2025-31131? CVE-2025-31131 is a high-severity path traversal vulnerability in yeswiki/yeswiki (composer), affecting versions < 4.5.2. It is fixed in 4.5.2. Input manipulates file paths to reach files outside the intended directory, such as configuration or credential files.
2. How severe is CVE-2025-31131? CVE-2025-31131 has a CVSS score of 8.6 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of yeswiki/yeswiki are affected by CVE-2025-31131? yeswiki/yeswiki (composer) versions < 4.5.2 is affected.
4. Is there a fix for CVE-2025-31131? Yes. CVE-2025-31131 is fixed in 4.5.2. Upgrade to this version or later.
5. Is CVE-2025-31131 exploitable, and should I be worried? Whether CVE-2025-31131 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2025-31131 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2025-31131? Upgrade yeswiki/yeswiki to 4.5.2 or later.