PUBLISHED DATE: May 5, 2025CVE-2025-27921:
Cross-Site Scripting Vulnerability

Description

A reflected cross-site scripting (XSS) vulnerability was discovered in Output Messenger before 2.0.63, where unsanitized input could be injected into the web application’s response. This vulnerability occurs when user-controlled input is reflected back into the browser without proper sanitization or encoding.

Questions to Ask Vendors

1. Can you confirm whether your systems are affected by CVE-2025-27921, and if so, what steps are you currently taking to mitigate this vulnerability?
2. What is your estimated timeline for fully resolving CVE-2025-27921 in your products or services, and how will you communicate updates on this issue to us as your customer?

Recommended Actions

• Check out the advisory links provided below.

References

• http://webappsec.pbworks.com/Cross-Site+Scripting
• https://capec.mitre.org/data/definitions/209.html
• https://capec.mitre.org/data/definitions/588.html
• https://capec.mitre.org/data/definitions/591.html
• https://capec.mitre.org/data/definitions/592.html
• https://capec.mitre.org/data/definitions/63.html
• https://capec.mitre.org/data/definitions/85.html
• https://nvd.nist.gov/vuln/detail/CVE-2025-27921