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CVE-2021-31673

35
FAUCET Score

CVE-2021-31673 is a DOM-based Cross-Site Scripting (XSS) vulnerability affecting Cyclos 4 PRO.14.7 and earlier versions, specifically within the registration account functionality. With a CVSS score of 6.1 (Medium), this vulnerability can be exploited remotely with low attack complexity, requiring user interaction, and could lead to low impact on confidentiality and integrity. While not listed on the KEV catalog and showing no social media or media coverage, a public exploit (EDB-50909) exists, indicating potential for exploitation despite limited community discussion.

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
2.56%
Probability of exploitation in next 30 days
EPSS Percentile
83.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-50909 · May 11, 2022
This CVE's current EPSS score of 0.0256 is in the 92nd percentile among its peer group of 26,234 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
ExploitThird Party AdvisoryVDB Entry
tf1t.gitbook.io / mycve/cylos/cyclos-4.14.7-dom-based-cross-site-scripting-cve-2021-31673
ExploitThird Party Advisory