What is CVE-2017-11667?

CVE-2017-11667 is a high-severity vulnerability in Openproject, classified under Insufficient Session Expiration. CVSS score: 8.1/10. Published 2017-07-26.

How severe is CVE-2017-11667?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Openproject

CVE-2017-11667

OpenProject before 6.1.6 and 7.x before 7.0.3 mishandles session expiry, which allows remote attackers to perform APIv3 requests indefinitely by leveraging a hijacked session.

Published 2017-07-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.8th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Openproject — versions 7.0.0, 7.0.1, 7.0.2

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

www.openproject.org/openproject-6-1-6-released-security-fix/ (Vendor Advisory)
www.openproject.org/openproject-7-0-3-released/ (Vendor Advisory)
github.com/opf/openproject/commit/0fdd7578909d2ec50abc275fc4962e99566437ee (Patch)

Frequently asked questions

What is CVE-2017-11667?: CVE-2017-11667 is a high-severity vulnerability in Openproject, classified under Insufficient Session Expiration. CVSS score: 8.1/10. Published 2017-07-26.
How severe is CVE-2017-11667?: High severity. CVSS v3 base score is 8.1 out of 10.