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CVE-2021-31674

36
FAUCET Score

CVE-2021-31674 is a DOM-based Cross-Site Scripting (XSS) vulnerability affecting Cyclos 4 PRO versions 4.14.7 and earlier. It allows an unauthenticated remote attacker to execute JavaScript code by injecting an undefined enum constant into an error message due to insufficient user input validation. The vulnerability has a CVSSv3.1 score of 6.1 (Medium), indicating a network-based attack with low complexity, requiring user interaction, and resulting in low confidentiality and integrity impacts. While not listed on CISA's KEV catalog and lacking Metasploit or Nuclei modules, an exploit (EDB-50908) is publicly available on ExploitDB. Despite this, there is minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.0.0, <= 4.14.7CPE matchmatch criteria
cpe:2.3:a:cyclos:cyclos:*:*:*:*:pro:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.95%
Probability of exploitation in next 30 days
EPSS Percentile
89.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-50908 · May 11, 2022
This CVE's current EPSS score of 0.0395 is in the 95th percentile among its peer group of 26,236 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/167040/Cyclos-4.14.7-Cross-Site-Scripting.html
tf1t.gitbook.io / mycve/cylos/cyclos-4.14.7-dom-based-cross-site-scripting-in-undefined-enum-cve-2021-31674
ExploitThird Party Advisory
exploit-db.com / exploits/50908
ExploitThird Party Advisory