CVE-2021-38455: The affected product’s OS Service does not verify any given parameter

Q: How do I fix CVE-2021-38455?

versiondog: upgrade to 8.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2021-38455 being exploited?

CVE-2021-38455 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-2021-38455 affect?

CVE-2021-38455 affects versiondog. Severity is high (CVSS 7.3). The affected product’s OS Service does not verify any given parameter. A user can supply any type of parameter that will be passed to inner calls without checking the type of the parameter or the value.

Routine

HIGH 7.3UPGRADE

CVE-2021-38455 is a high-severity flaw (CVSS 7.3) affecting versiondog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The affected product’s OS Service does not verify any given parameter. A user can supply any type of parameter that will be passed to inner calls without checking the type of the parameter or the value.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-20
Published	2021-10-22
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: auvesy

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

Am I affected?

Timeline

2021-10-22 12:15 UTCPublished CVE record published
2026-06-17 04:02 UTCUpdated Record last modified

auvesy versiondog UPGRADE

Affected: < 8.0.0

Fixed in: 8.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 8.0.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade versiondog

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-2021-38455?

versiondog: upgrade to 8.0.0. Exact commands for each OS are on this page.

Is CVE-2021-38455 being exploited?

CVE-2021-38455 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-2021-38455 affect?

CVE-2021-38455 affects versiondog. Severity is high (CVSS 7.3). The affected product’s OS Service does not verify any given parameter. A user can supply any type of parameter that will be passed to inner calls without checking the type of the parameter or the value.

How urgent is CVE-2021-38455?

Priority 39/100. High severity

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References

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