CVE-2025-55796: The openml/openml.org web application version v2.0.20241110 uses predictable MD5-based tokens for critical use

Q: How do I fix CVE-2025-55796?

openml frontend: upgrade to 2.0.20251111. Exact commands for each OS are on this page.

Q: Is CVE-2025-55796 being exploited?

CVE-2025-55796 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-2025-55796 affect?

CVE-2025-55796 affects openml frontend. Severity is high (CVSS 7.5). The openml/openml.org web application version v2.0.20241110 uses predictable MD5-based tokens for critical user workflows such as signup confirmation, password resets, email confirmation resends, and email change confirmation. These tokens

Q: How urgent is CVE-2025-55796?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2025-55796 is a high-severity flaw (CVSS 7.5) affecting openml frontend. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The openml/openml.org web application version v2.0.20241110 uses predictable MD5-based tokens for critical user workflows such as signup confirmation, password resets, email confirmation resends, and email change confirmation. These tokens are generated by hashing the current timestamp formatted as "%d %H:%M:%S" without incorporating any user-specific data or cryptographic randomness. This predictability allows remote attackers to brute-force val

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-400
Published	2025-11-18
Last modified	2026-09-29

Publisher (CNA): MITRE · Vendor: openml

Last updated 2026-09-29 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-18 17:16 UTCPublished CVE record published
2026-09-29 14:41 UTCUpdated Record last modified

openml openml frontend UPGRADE

Affected: < 2.0.20251111

Fixed in: 2.0.20251111

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openml-frontend || rpm -q openml-frontend || openml-frontend --version

2. UPGRADE to 2.0.20251111 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openml-frontend

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openml-frontend

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-2025-55796?

openml frontend: upgrade to 2.0.20251111. Exact commands for each OS are on this page.

Is CVE-2025-55796 being exploited?

CVE-2025-55796 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-2025-55796 affect?

CVE-2025-55796 affects openml frontend. Severity is high (CVSS 7.5). The openml/openml.org web application version v2.0.20241110 uses predictable MD5-based tokens for critical user workflows such as signup confirmation, password resets, email confirmation resends, and email change confirmation. These tokens

How urgent is CVE-2025-55796?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-55795 LOW 3.5 UPGRADE The openml/openml.org web application version v2.0.20241110 uses incremental user IDs and insufficient email o

References

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