Skip to content
Fencer Intel
low 3.7

CVE-2021-4258 json

whohas Package Information cleartext transmission

published 3y ago modified 4mo ago also EUVD-2021-34104

cvss
3.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

A vulnerability was found in whohas. It has been rated as problematic. This issue affects some unknown processing of the component Package Information Handler. The manipulation leads to cleartext transmission of sensitive information. The attack may be initiated remotely. The real existence of this vulnerability is still doubted at the moment. The name of the patch is 667c3e2e9178f15c23d7918b5db25cd0792c8472. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-216251. NOTE: Most sources redirect to the encrypted site which limits the possibilities of an attack.

Patch / fix

  • whohas_project whohas 2021-11-01

Is CVE-2021-4258 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • unspecified whohas

Classification

Weakness
  • CWE-310 Cryptographic Issues
  • CWE-319 Cleartext Transmission of Sensitive Information

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.