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CVE-2025-27913

HIGH
7.5
CVSS Score
Published: March 10, 2025 at 12:00 AM UTC
Updated: June 17, 2026 at 09:04 AM UTC
1 product affected across 1 vendorPassbolt API

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Severity
HIGH7.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Passbolt API· Passbolt
95%
v < 5
Affected range stops below 5, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.0.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

MitigationVendor Advisory
Source: [email protected]
https://www.passbolt.com/incidents/host-header-injection

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-348

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