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CVE-2021-4121

22
FAUCET Score

CVE-2021-4121 is a Cross-site Scripting (XSS) vulnerability (CWE-79) affecting yetiforcecrm, specifically yetiforce_customer_relationship_management. This medium-severity vulnerability (CVSS 6.1) can be exploited remotely with low attack complexity, requiring user interaction, and could lead to limited confidentiality and integrity impacts. There is currently no evidence of active exploitation, no public exploit code available (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.3.0CPE matchmatch criteria
cpe:2.3:a:yetiforce:yetiforce_customer_relationship_management:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.4MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.1
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.76%
Probability of exploitation in next 30 days
EPSS Percentile
51.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0076 is in the 59th percentile among its peer group of 26,219 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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-j85f-xw9x-ffwpmedium

yetiforcecrm is vulnerable to Cross-site Scripting

Dec 17, 2021

References

github.com / yetiforcecompany/yetiforcecrm/commit/6b5967198e43b6fbb3b2715b49c6cd5b12ce08c3
PatchThird Party Advisory
huntr.dev / bounties/6da878de-acdb-4b97-b9ff-9674c3f0881d
ExploitPatchThird Party Advisory