CVE-2025-8454: It was discovered that uscan, a tool to scan/watch upstream sources for new releases of software, included in

This month

CRITICAL 9.8REMOTEWATCHLISTDOWNGRADE

CVE-2025-8454 is a critical-severity flaw (CVSS 9.8) affecting devscripts. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

It was discovered that uscan, a tool to scan/watch upstream sources for new releases of software, included in devscripts (a collection of scripts to make the life of a Debian Package maintainer easier), skips OpenPGP verification if the upstream source is already downloaded from a previous run even if the verification failed back then.

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-347
Published	2025-08-01
Last modified	2026-06-17

Publisher (CNA): Debian GNU/Linux · Vendor: debian

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

Am I affected?

Timeline

2025-08-01 06:15 UTCPublished CVE record published
2026-06-17 10:07 UTCUpdated Record last modified

debian devscripts DOWNGRADE

Affected: 2.25.15

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.25.15

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.25.15 (Debian / Ubuntu)

apt-cache madison devscripts sudo apt install devscripts=<VERSION_BEFORE_2.25.15> sudo apt-mark hold devscripts

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

dnf --showduplicates list devscripts sudo dnf downgrade devscripts-<VERSION_BEFORE_2.25.15> sudo dnf versionlock add devscripts

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-2025-8454?

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

Is CVE-2025-8454 being exploited?

CVE-2025-8454 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-2025-8454 affect?

CVE-2025-8454 affects devscripts. Severity is critical (CVSS 9.8). It was discovered that uscan, a tool to scan/watch upstream sources for new releases of software, included in devscripts (a collection of scripts to make the life of a Debian Package maintainer easier), skips OpenPGP verification if the ups

How urgent is CVE-2025-8454?

Priority 49/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

References

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