CVE-2017-11667

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.1EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.4%CVSS: 8.1Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

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.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
42
EG Risk 42/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation1% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.
EPSS PROB
1.4%
EPSS %ILE
72nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 26, 2017

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Sep 16, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

OpenProject 7.0.3 released with a security fix

https://www.openproject.org/openproject-7-0-3-released/
generic

OpenProject 6.1.6 released with a security fix

https://www.openproject.org/openproject-6-1-6-released-security-fix/
github_commit

commit 0fdd7578909d (opf/openproject)

Fix landed in opf/openproject commit 0fdd7578909d — awaiting tagged release

https://github.com/opf/openproject/commit/0fdd7578909d2ec50abc275fc4962e99566437ee

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 154 total refreshes for this CVE.

  1. 2026-10-10 19:55 UTCEPSS rescore
  2. 2026-10-09 20:02 UTCEPSS rescore
  3. 2026-10-08 16:35 UTCEPSS rescore
  4. 2026-10-08 02:35 UTCOSV refresh
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  10. 2026-09-30 09:23 UTCEG score recompute
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  16. 2026-09-18 08:50 UTCOSV refresh
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  1. 2026-09-01 13:48 UTCEPSS rescore
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  3. 2026-08-30 19:13 UTCEPSS rescore
  4. 2026-08-30 09:30 UTCOSV refresh
  5. 2026-08-28 21:36 UTCEPSS rescore
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  19. 2026-08-13 21:56 UTCEPSS rescore
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  21. 2026-08-08 16:32 UTCEPSS rescore
  22. 2026-08-07 16:22 UTCEPSS rescore
  23. 2026-08-06 13:42 UTCEPSS rescore
  24. 2026-08-05 19:12 UTCEPSS rescore
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  32. 2026-07-29 03:34 UTCOSV refresh
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  35. 2026-07-25 14:13 UTCEPSS rescore
  36. 2026-07-23 14:15 UTCEPSS rescore
  37. 2026-07-23 01:26 UTCEG score recompute
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  39. 2026-07-22 14:04 UTCEPSS rescore
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  49. 2026-07-16 16:59 UTCEPSS rescore
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  51. 2026-07-15 16:54 UTCEPSS rescore
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  54. 2026-07-13 22:26 UTCEPSS rescore
  55. 2026-07-13 06:09 UTCEPSS rescore
  56. 2026-07-12 05:43 UTCEPSS rescore
  57. 2026-07-11 20:11 UTCOSV refresh
  58. 2026-07-11 08:24 UTCEPSS rescore
  59. 2026-07-09 19:06 UTCEPSS rescore
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  67. 2026-06-30 23:19 UTCEPSS rescore
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  72. 2026-06-25 13:47 UTCEPSS rescore
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  74. 2026-06-24 14:02 UTCEPSS rescore
  75. 2026-06-23 21:30 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2017-11667?
CVE-2017-11667 is a high vulnerability published on July 26, 2017. 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.
When was CVE-2017-11667 disclosed?
CVE-2017-11667 was first published on July 26, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-11667 actively exploited?
CVE-2017-11667 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.4% probability of exploitation in the next 30 days (72nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2017-11667?
CVE-2017-11667 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2017-11667?
An upstream fix for CVE-2017-11667 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix.

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