How severe is CVE-2021-40324?

CVE-2021-40324 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-40324 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 69% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40324?

CVE-2021-40324 affects Cobbler Project Cobbler. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40324?

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-2021-40324 published?

CVE-2021-40324 was published on 2021-10-04 and last updated on 2026-06-17.

CVE-2021-40324

CVE-2021-40324 is a high-severity vulnerability in Cobbler Project Cobbler with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 69% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 69% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Cobbler Project Cobbler
Published: 2021-10-04
Last modified: 2026-06-17

Description

Cobbler before 3.3.0 allows arbitrary file write operations via upload_log_data.

Frequently asked questions

What is CVE-2021-40324?: Cobbler before 3.3.0 allows arbitrary file write operations via upload_log_data.
How severe is CVE-2021-40324?: CVE-2021-40324 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-40324 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 69% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40324?: CVE-2021-40324 affects Cobbler Project Cobbler. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40324?: 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-2021-40324 published?: CVE-2021-40324 was published on 2021-10-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cobbler_project:cobbler:*:*:*:*:*:*:*:*

More vulnerabilities in Cobbler Project Cobbler

CVE-2021-40323 — Critical (CVSS 9.8): Cobbler before 3.3.0 allows log poisoning, and resultant Remote Code Execution, via an XMLRPC method that logs to the…
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CVE-2017-1000469 — Critical (CVSS 9.8): Cobbler version up to 2.8.2 is vulnerable to a command injection vulnerability in the "add repo" component resulting in…
CVE-2022-0860 — Critical (CVSS 9.1): Improper Authorization in GitHub repository cobbler/cobbler prior to 3.3.2.
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CVE-2021-40325 — High (CVSS 7.5): Cobbler before 3.3.0 allows authorization bypass for modification of settings.

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