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CVE-2021-30175

46
FAUCET Score

CVE-2021-30175 describes a critical SQL Injection vulnerability affecting ZEROF Web Server 1.0 (April 2021) through its /HandleEvent endpoint on the login page. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network without authentication, allowing for complete compromise of confidentiality, integrity, and availability. While not listed in CISA's KEV catalog, its high EPSS score and FAUCET Risk Score indicate a significant likelihood of exploitation, further supported by the existence of Nuclei templates and community discussion, despite no known active exploitation or Metasploit modules.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:zerof:web_server:1.0:*:*:*:*:*:*:*

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
8.55%
Probability of exploitation in next 30 days
EPSS Percentile
94.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
Nuclei: CVE-2021-30175 · Sep 29, 2022
This CVE's current EPSS score of 0.0855 is in the 90th percentile among its peer group of 36,897 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

github.com / awillix/research/blob/main/cve/CVE-2021-30175.md
Third Party Advisory
pro.zerof.ru
Product