How severe is CVE-2020-25039?

CVE-2020-25039 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-2020-25039 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-25039?

CVE-2020-25039 primarily affects Sylabs Singularity. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-25039?

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-2020-25039 published?

CVE-2020-25039 was published on 2020-09-16 and last updated on 2026-06-17.

CVE-2020-25039

CVE-2020-25039 is a high-severity vulnerability in Sylabs Singularity 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. The underlying weakness is classified as CWE-668.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 5.5
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-668
Affected product: Sylabs Singularity
Published: 2020-09-16
Last modified: 2026-06-17

Description

Sylabs Singularity 3.2.0 through 3.6.2 has Insecure Permissions on temporary directories used in fakeroot or user namespace container execution.

Frequently asked questions

What is CVE-2020-25039?: Sylabs Singularity 3.2.0 through 3.6.2 has Insecure Permissions on temporary directories used in fakeroot or user namespace container execution.
How severe is CVE-2020-25039?: CVE-2020-25039 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-2020-25039 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-25039?: CVE-2020-25039 primarily affects Sylabs Singularity. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-25039?: 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-2020-25039 published?: CVE-2020-25039 was published on 2020-09-16 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:sylabs:singularity:*:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*

More vulnerabilities in Sylabs Singularity

CVE-2021-33027 — Critical (CVSS 9.8): Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.
CVE-2021-33622 — Critical (CVSS 9.8): Sylabs Singularity 3.5.x and 3.6.x, and SingularityPRO before 3.5-8, has an Incorrect Check of a Function's Return…
CVE-2020-25040 — High (CVSS 8.8): Sylabs Singularity through 3.6.2 has Insecure Permissions on temporary directories used in explicit and implicit…
CVE-2019-11328 — High (CVSS 8.8): An issue was discovered in Singularity 3.1.0 to 3.2.0-rc2, a malicious user with local/network access to the host…
CVE-2020-15229 — High (CVSS 8.2): Singularity (an open source container platform) from version 3.1.1 through 3.6.3 has a vulnerability. Due to insecure…
CVE-2018-19295 — High (CVSS 7.8): Sylabs Singularity 2.4 to 2.6 allows local users to conduct Improper Input Validation attacks.

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