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LOW · 3.0

CVE-2026-31974

OpenProject is an open-source, web-based project management software. Prior to 17.2.0, OpenProject SMTP test endpoint (POST /admin/settings/mail_notifications) accepts arbitrary host and port values a...

Vulnerability Description

OpenProject is an open-source, web-based project management software. Prior to 17.2.0, OpenProject SMTP test endpoint (POST /admin/settings/mail_notifications) accepts arbitrary host and port values and exhibits measurable differences in response behaviour depending on whether the target IP exists and whether the port is open. An attacker with access can use these timing and error distinctions to map internal hosts and identify which services/ports are reachable. Similarly, you can create webhooks in OpenProject and point them to arbitrary IPs, resulting in the same kind of SSRF issue which allows attackers to scan the internal network. This vulnerability is fixed in 17.2.0.

CVSS Score

3.0

LOW

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE

Affected Products

VendorProductVersions
OpenprojectOpenproject< 17.2.0

Related Weaknesses (CWE)

CWE-918

References

FAQ

What is CVE-2026-31974?

CVE-2026-31974 is a vulnerability with a CVSS score of 3.0 (LOW). OpenProject is an open-source, web-based project management software. Prior to 17.2.0, OpenProject SMTP test endpoint (POST /admin/settings/mail_notifications) accepts arbitrary host and port values a...

How severe is CVE-2026-31974?

CVE-2026-31974 has been rated LOW with a CVSS base score of 3.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-31974?

Check the references section above for vendor advisories and patch information. Affected products include: Openproject Openproject.