CVE-2025-67397: An issue in Passy v.1.6.3 allows a remote authenticated attacker to execute arbitrary commands via a crafted H

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CRITICAL 9.1DOWNGRADE

CVE-2025-67397 is a critical-severity flaw (CVSS 9.1) affecting passy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in Passy v.1.6.3 allows a remote authenticated attacker to execute arbitrary commands via a crafted HTTP request using a specific payload injection.

Why this priority

Critical severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-77
Published	2026-01-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: passy

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

Am I affected?

Timeline

2026-01-05 19:15 UTCPublished CVE record published
2026-06-17 09:57 UTCUpdated Record last modified

passy passy DOWNGRADE

Affected: 1.6.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.6.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.6.3 (Debian / Ubuntu)

apt-cache madison passy sudo apt install passy=<VERSION_BEFORE_1.6.3> sudo apt-mark hold passy

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list passy sudo dnf downgrade passy-<VERSION_BEFORE_1.6.3> sudo dnf versionlock add passy

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2025-67397?

passy: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-67397 being exploited?

CVE-2025-67397 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-2025-67397 affect?

CVE-2025-67397 affects passy. Severity is critical (CVSS 9.1). An issue in Passy v.1.6.3 allows a remote authenticated attacker to execute arbitrary commands via a crafted HTTP request using a specific payload injection.

How urgent is CVE-2025-67397?

Priority 46/100. Critical severity

References

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