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Fencer Intel
medium 6.4

CVE-2021-4121 json

Cross-site Scripting (XSS) - Stored in yetiforcecompany/yetiforcecrm

published 4y ago modified 4mo ago also GHSA-j85f-xw9x-ffwp , EUVD-2021-2542

cvss
6.4
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

yetiforcecrm is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Patch / fix

  • yetiforcecompany yetiforcecompany/yetiforcecrm 6.4.0

Is CVE-2021-4121 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • huntr.dev https://huntr.dev/bounties/6da878de-acdb-4b97-b9ff-9674c3f0881d referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 6.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub 3.0 6.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L

Affected packages

ecosystem package affected fixed in
packagist yetiforce/yetiforce-crm
<=6.3.0
 no fix listed

Affected products

  • yetiforcecompany yetiforcecompany/yetiforcecrm

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.