CVE-2025-27921

Name: CVE-2025-27921
Creator: NVD / NIST
Published: 2025-05-05T16:15:51.143+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2025-27921 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.37%

28.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Srimax	Output Messenger	< 2.0.63

References

https://www.outputmessenger.com/cve-2025-27921/Vendor Advisory
https://www.srimax.com/products-2/output-messenger/Product

Timeline

Published: May 5, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-27921?

How severe is CVE-2025-27921?

CVE-2025-27921 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2025-27921?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-27921?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST