How severe is CVE-2018-1000193?

CVE-2018-1000193 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2018-1000193 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1000193?

CVE-2018-1000193 primarily affects Jenkins. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-1000193?

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

When was CVE-2018-1000193 published?

CVE-2018-1000193 was published on 2018-06-05 and last updated on 2026-06-17.

CVE-2018-1000193

CVE-2018-1000193 is a medium-severity vulnerability in Jenkins with a CVSS 3.x base score of 4.3. 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-74.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Jenkins
Published: 2018-06-05
Last modified: 2026-06-17

Description

A improper neutralization of control sequences vulnerability exists in Jenkins 2.120 and older, LTS 2.107.2 and older in HudsonPrivateSecurityRealm.java that allows users to sign up using user names containing control characters that can then appear to have the same name as other users, and cannot be deleted via the UI.

Frequently asked questions

What is CVE-2018-1000193?: A improper neutralization of control sequences vulnerability exists in Jenkins 2.120 and older, LTS 2.107.2 and older in HudsonPrivateSecurityRealm.java that allows users to sign up using user names containing control characters that can then appear to have the same name as other users, and cannot be deleted via the UI.
How severe is CVE-2018-1000193?: CVE-2018-1000193 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2018-1000193 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1000193?: CVE-2018-1000193 primarily affects Jenkins. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-1000193?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-1000193 published?: CVE-2018-1000193 was published on 2018-06-05 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:jenkins:jenkins:*:*:*:*:*:*:*:*
cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_automated_test_suite:1.9.0:*:*:*:*:*:*:*

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