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CVE-2021-30461

62
FAUCET Score

CVE-2021-30461 is a critical remote code execution vulnerability affecting the web UI of VoIPmonitor versions prior to 24.61. It allows an unauthenticated attacker to inject malicious PHP code into the configuration file by manipulating the SPOOLDIR value during a recheck operation. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low complexity, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public Metasploit/ExploitDB modules, Nuclei templates exist for detection, and its high EPSS score indicates a significant likelihood of future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 24.61CPE matchmatch criteria
cpe:2.3:a:voipmonitor:voipmonitor:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
36.63%
Probability of exploitation in next 30 days
EPSS Percentile
98.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2021-30461 · May 7, 2021
This CVE's current EPSS score of 0.3663 is in the 96th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ssd-disclosure.com / ssd-advisory--voipmonitor-unauth-rce
ExploitThird Party Advisory