How severe is CVE-2017-1000091?

CVE-2017-1000091 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2017-1000091 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-1000091?

CVE-2017-1000091 primarily affects Jenkins Github Branch Source. In total, 39 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-1000091?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-1000091 published?

CVE-2017-1000091 was published on 2017-10-05 and last updated on 2026-06-17.

CVE-2017-1000091

CVE-2017-1000091 is a medium-severity vulnerability in Jenkins Github Branch Source with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.8
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Jenkins Github Branch Source
Published: 2017-10-05
Last modified: 2026-06-17

Description

GitHub Branch Source Plugin connects to a user-specified GitHub API URL (e.g. GitHub Enterprise) as part of form validation and completion (e.g. to verify Scan Credentials are correct). This functionality improperly checked permissions, allowing any user with Overall/Read access to Jenkins to connect to any web server and send credentials with a known ID, thereby possibly capturing them. Additionally, this functionality did not require POST requests be used, thereby allowing the above to be performed without direct access to Jenkins via Cross-Site Request Forgery.

Frequently asked questions

What is CVE-2017-1000091?: GitHub Branch Source Plugin connects to a user-specified GitHub API URL (e.g. GitHub Enterprise) as part of form validation and completion (e.g. to verify Scan Credentials are correct). This functionality improperly checked permissions, allowing any user with Overall/Read access to Jenkins to connect to any web server and send credentials with a known ID, thereby possibly capturing them. Additionally, this functionality did not require POST requests be used, thereby allowing the above to be performed without direct access to Jenkins via Cross-Site Request Forgery.
How severe is CVE-2017-1000091?: CVE-2017-1000091 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2017-1000091 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-1000091?: CVE-2017-1000091 primarily affects Jenkins Github Branch Source. In total, 39 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-1000091?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-1000091 published?: CVE-2017-1000091 was published on 2017-10-05 and last updated on 2026-06-17.

References

https://jenkins.io/security/advisory/2017-07-10/

Affected products (39)

cpe:2.3:a:jenkins:github_branch_source:0.1:beta-1:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:0.1:beta-2:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:0.1:beta-3:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:0.1:beta-4:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.0:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.1:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.2:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.3:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.4:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.4:beta-1:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.5:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.6:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.7:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.8:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.8.1:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.9:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:1.10:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.0:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.0:beta-1:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.0:beta-2:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.1:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.1:beta-1:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.1:beta-2:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.1:beta-3:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.1:beta-4:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.1:beta-5:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.1:beta-6:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.2:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.3:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.4:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.4:beta-1:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.5:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.6:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.0.7:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.2.0:alpha-1:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.2.0:alpha-2:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.2.0:alpha-3:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.2.0:alpha-4:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:github_branch_source:2.2.0:beta-1:*:*:*:jenkins:*:*

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