CVE-2025-27913: passbolt api — Fix

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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness Type (CWE)

CWE-348 CWE-348

Affected Products

Vendor	Product	Versions
passbolt	passbolt_api	< 5.0.0

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-27913? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-27913? +

CVE-2025-27913 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-27913? +

CVE-2025-27913 affects products from passbolt, specifically: passbolt_api. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-27913? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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