Auth bypass in Openml Openml.org
CVE-2025-55795
The openml/openml.org web application version v2.0.20241110 uses incremental user IDs and insufficient email ownership verification during email update workflows. An authenticated attacker controlling a user account with a lower user ID can update their email address to that of another user with a higher user ID without proper verification. This results in the victim's email being reassigned to the attacker's account, causing the victim to be locked out immediately and unable to log in. The vulnerability leads to denial of service via account lockout but does not grant the attacker direct access to the victim's private data.
EPSS: 0.003 (20.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N.
Affected products
- Openml Openml.org
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Product)
- cve@mitre.org (Product)
- cve@mitre.org (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-55795?
- CVE-2025-55795 is a low-severity vulnerability in Openml Openml.org, classified under Improper Access Control. CVSS score: 3.5/10. Published 2025-09-29.
- How severe is CVE-2025-55795?
- Low severity. CVSS v3 base score is 3.5 out of 10.
- Is CVE-2025-55795 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.