CVE-2025-25202: Ash Authentication is an authentication framework for Elixir applications

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MEDIUM 6.5REMOTEUPGRADE

CVE-2025-25202 is a medium-severity flaw (CVSS 6.5) affecting ash authentication. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Ash Authentication is an authentication framework for Elixir applications. Applications which have been bootstrapped by the igniter installer present since AshAuthentication v4.1.0 and who have used the magic link strategy _or_ are manually revoking tokens are affected by revoked tokens being allowed to verify as valid. Unless one hase implemented any kind of custom token revocation feature in your application, then one will not be affected. The

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-269
Published	2025-02-11
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: alembic

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

Am I affected?

Timeline

2025-02-11 19:15 UTCPublished CVE record published
2026-06-17 09:00 UTCUpdated Record last modified

alembic ash authentication UPGRADE

Affected: >= 4.1.0 and < 4.4.9

Fixed in: 4.4.9

Safe to downgrade to: a release before 4.1.0

1. Check installed version

apt-cache policy ash-authentication || rpm -q ash-authentication || ash-authentication --version

2. UPGRADE to 4.4.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ash-authentication

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ash-authentication

Note

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

3. If no update is available yet, DOWNGRADE to a release before 4.1.0 (Debian / Ubuntu)

apt-cache madison ash-authentication sudo apt install ash-authentication=<VERSION_BEFORE_4.1.0> sudo apt-mark hold ash-authentication

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ash-authentication sudo dnf downgrade ash-authentication-<VERSION_BEFORE_4.1.0> sudo dnf versionlock add ash-authentication

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-2025-25202?

ash authentication: upgrade to 4.4.9. Exact commands for each OS are on this page.

Is CVE-2025-25202 being exploited?

CVE-2025-25202 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-2025-25202 affect?

CVE-2025-25202 affects ash authentication. Severity is medium (CVSS 6.5). Ash Authentication is an authentication framework for Elixir applications. Applications which have been bootstrapped by the igniter installer present since AshAuthentication v4.1.0 and who have used the magic link strategy _or_ are manually

How urgent is CVE-2025-25202?

Priority 39/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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