CVE-2021-4258: A vulnerability was found in whohas

Q: How do I fix CVE-2021-4258?

whohas: upgrade to 2021-11-01. Exact commands for each OS are on this page.

Q: Is CVE-2021-4258 being exploited?

CVE-2021-4258 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-4258 affect?

CVE-2021-4258 affects whohas. Severity is low (CVSS 3.7). 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 a

Q: How urgent is CVE-2021-4258?

Priority 27/100. Remotely exploitable, no login, no user action

Routine

LOW 3.7REMOTEUPGRADE

CVE-2021-4258 is a low-severity flaw (CVSS 3.7) affecting whohas. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-310, CWE-319
Published	2022-12-19
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: whohas project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-12-19 14:15 UTCPublished CVE record published
2026-06-17 04:19 UTCUpdated Record last modified

whohas project whohas UPGRADE

Affected: < 2021-11-01

Fixed in: 2021-11-01

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy whohas || rpm -q whohas || whohas --version

2. UPGRADE to 2021-11-01 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade whohas

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade whohas

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-4258?

whohas: upgrade to 2021-11-01. Exact commands for each OS are on this page.

Is CVE-2021-4258 being exploited?

CVE-2021-4258 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-4258 affect?

CVE-2021-4258 affects whohas. Severity is low (CVSS 3.7). 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 a

How urgent is CVE-2021-4258?

Priority 27/100. Remotely exploitable, no login, no user action

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References

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