How severe is CVE-2021-45101?

CVE-2021-45101 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-45101 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45101?

CVE-2021-45101 primarily affects Wisc Htcondor. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-45101?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-45101 published?

CVE-2021-45101 was published on 2021-12-16 and last updated on 2026-06-17.

CVE-2021-45101

CVE-2021-45101 is a high-severity vulnerability in Wisc Htcondor with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 5.5
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Wisc Htcondor
Published: 2021-12-16
Last modified: 2026-06-17

Description

An issue was discovered in HTCondor before 8.8.15, 9.0.x before 9.0.4, and 9.1.x before 9.1.2. Using standard command-line tools, a user with only READ access to an HTCondor SchedD or Collector daemon can discover secrets that could allow them to control other users' jobs and/or read their data.

Frequently asked questions

What is CVE-2021-45101?: An issue was discovered in HTCondor before 8.8.15, 9.0.x before 9.0.4, and 9.1.x before 9.1.2. Using standard command-line tools, a user with only READ access to an HTCondor SchedD or Collector daemon can discover secrets that could allow them to control other users' jobs and/or read their data.
How severe is CVE-2021-45101?: CVE-2021-45101 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-45101 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45101?: CVE-2021-45101 primarily affects Wisc Htcondor. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-45101?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-45101 published?: CVE-2021-45101 was published on 2021-12-16 and last updated on 2026-06-17.

References

https://research.cs.wisc.edu/htcondor/security/vulnerabilities/HTCONDOR-2021-0003/

Affected products (2)

cpe:2.3:a:wisc:htcondor:*:*:*:*:*:*:*:*
cpe:2.3:a:wisc:htcondor:9.1.0:*:*:*:*:*:*:*

More vulnerabilities in Wisc Htcondor

CVE-2021-25311 — Critical (CVSS 9.9): condor_credd in HTCondor before 8.9.11 allows Directory Traversal outside the SEC_CREDENTIAL_DIRECTORY_OAUTH directory,…
CVE-2019-18823 — Critical (CVSS 9.8): HTCondor up to and including stable series 8.8.6 and development series 8.9.4 has Incorrect Access Control. It is…
CVE-2022-26110 — High (CVSS 8.8): An issue was discovered in HTCondor 8.8.x before 8.8.16, 9.0.x before 9.0.10, and 9.1.x before 9.6.0. When a user…
CVE-2021-45102 — High (CVSS 8.8): An issue was discovered in HTCondor 9.0.x before 9.0.4 and 9.1.x before 9.1.2. When authenticating to an HTCondor…
CVE-2021-25312 — High (CVSS 8.8): HTCondor before 8.9.11 allows a user to submit a job as another user on the system, because of a flaw in the IDTOKENS…
CVE-2014-8126 — High (CVSS 8.8): The scheduler in HTCondor before 8.2.6 allows remote authenticated users to execute arbitrary code.

All CVEs affecting Wisc Htcondor →