CRLF header injection in FortiMail

1) CRLF injection

EUVDB-ID: #VU118606

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-54972

CWE-ID: CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to inject arbitrary data in server response.

The vulnerability exists due to insufficient validation of attacker-supplied data in FortiMail user GUI. A remote attacker can inject headers in the response via convincing a user to click on a specifically crafted link.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FortiMail: 7.0.0 - 7.6.3

CPE2.3

• cpe:2.3:a:fortinet:fortinet_fortimail:7.0.9:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortimail:7.2.8:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortimail:7.4.5:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortimail:7.6.3:*:*:*:*:*:*:*

External links

https://www.fortiguard.com/psirt/FG-IR-25-634

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.