CVE-2021-30461

Name: CVE-2021-30461
Creator: NVD / NIST
Published: 2021-05-29T14:15:08.4+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 36.63%

Last modified Jun 17, 2026

CVE-2021-30461 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A remote code execution issue was discovered in the web UI of VoIPmonitor before 24.61. When the recheck option is used, the user-supplied SPOOLDIR value (which might contain PHP code) is injected into config/configuration.php.. EPSS estimates a 36.63% chance of exploitation in the next 30 days.

Description

A remote code execution issue was discovered in the web UI of VoIPmonitor before 24.61. When the recheck option is used, the user-supplied SPOOLDIR value (which might contain PHP code) is injected into config/configuration.php.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

36.63%

98.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-94

Affected Software

Vendor	Product	Versions
Voipmonitor	Voipmonitor	< 24.61

References

https://ssd-disclosure.com/ssd-advisory--voipmonitor-unauth-rceExploit, Third Party Advisory
https://ssd-disclosure.com/ssd-advisory--voipmonitor-unauth-rceExploit, Third Party Advisory

Timeline

Published: May 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30461?

How severe is CVE-2021-30461?

CVE-2021-30461 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 36.63% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30461?

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-2021-30461?

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

Scan your code now

Source: NVD / NIST