CVE-2025-46550

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
Vulnerable Parameter: idformulaire
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&vue=formulaire&action=confirm_delete&idformulaire=%3cscript%3ealert(1)%3c%2fscript%3e

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.

Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.

CVE-2025-46550 has a CVSS score of 5.3 (Medium). 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 (4.5.4); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is CVE-2025-46550? CVE-2025-46550 is a medium-severity cross-site scripting (XSS) vulnerability in yeswiki/yeswiki (composer), affecting versions <= 4.5.3. It is fixed in 4.5.4. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
2. How severe is CVE-2025-46550? CVE-2025-46550 has a CVSS score of 5.3 (Medium). 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-2025-46550? yeswiki/yeswiki (composer) versions <= 4.5.3 is affected.
4. Is there a fix for CVE-2025-46550? Yes. CVE-2025-46550 is fixed in 4.5.4. Upgrade to this version or later.
5. Is CVE-2025-46550 exploitable, and should I be worried? Whether CVE-2025-46550 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-2025-46550 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-2025-46550? Upgrade yeswiki/yeswiki to 4.5.4 or later.