CVE-2021-21621
CVE-2021-21621 is a medium-severity vulnerability in Jenkins Support Core with a CVSS 3.x base score of 5.3. 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-200.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (65th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-200
- Affected product: Jenkins Support Core
- Published:
- Last modified:
Description
Jenkins Support Core Plugin 2.72 and earlier provides the serialized user authentication as part of the "About user (basic authentication details only)" information, which can include the session ID of the user creating the support bundle in some configurations.
Frequently asked questions
- What is CVE-2021-21621?
- Jenkins Support Core Plugin 2.72 and earlier provides the serialized user authentication as part of the "About user (basic authentication details only)" information, which can include the session ID of the user creating the support bundle in some configurations.
- How severe is CVE-2021-21621?
- CVE-2021-21621 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
- Is CVE-2021-21621 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-21621?
- CVE-2021-21621 affects Jenkins Support Core. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-21621?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-21621 published?
- CVE-2021-21621 was published on 2021-02-24 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:jenkins:support_core:*:*:*:*:*:jenkins:*:*
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