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CVE-2025-55796

Openml Frontend denial of service

7.5 HIGHPublic exploitEPSS 0.59%
  1. Published18 Nov 2025

Description

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 valid tokens within a small time window, enabling unauthorized account confirmation, password resets, and email change approvals, potentially leading to account takeover.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Openml Frontend< 2.0.20251111

Remediation

Fixed in
Openml Frontend≥ 2.0.20251111

References

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Frequently asked

Is CVE-2025-55796 being actively exploited?

CVE-2025-55796 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.59%.

How severe is CVE-2025-55796?

CVE-2025-55796 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.59% probability of exploitation.

Which products are affected by CVE-2025-55796?

Affected products include Openml Frontend.

How do I fix CVE-2025-55796?

Upgrade affected software to a fixed version, for example Openml Frontend 2.0.20251111 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-55796 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.