Servers and applications

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.

Severity: High 8.1
Published: 26 Jul 2017
Last changed: 17 Jun 2026
Added to UpHeron: 1 Nov 2026
Exploit chance: 1.4% in the next 30 daysHigher than 73% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness: Insufficient session expiration (CWE-613)
Attack: Over the network · Only under certain conditions · No login needed · No user action needed
Attacker can: Read data · Change data · Take it down
CVSS vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Sources: NVD

Affected software

Software	Affected versions
OpenProjectServers and applications · `cpe:a:openproject:openproject`	Every version up to 6.1.5 Version 7.0.0 Version 7.0.1 Version 7.0.2

References

NVD https://nvd.nist.gov/vuln/detail/CVE-2017-11667
CVE.org https://www.cve.org/CVERecord?id=CVE-2017-11667