How severe is CVE-2021-32825?

CVE-2021-32825 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-32825 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32825?

CVE-2021-32825 affects Bblfshd Project Bblfshd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32825?

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

When was CVE-2021-32825 published?

CVE-2021-32825 was published on 2021-08-16 and last updated on 2026-06-17.

CVE-2021-32825

CVE-2021-32825 is a low-severity vulnerability in Bblfshd Project Bblfshd with a CVSS 3.x base score of 2.7. 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-59.

Key facts

Severity: Low (CVSS 3.x base score 2.7)
CVSS v2: 5.5
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-59
Affected product: Bblfshd Project Bblfshd
Published: 2021-08-16
Last modified: 2026-06-17

Description

bblfshd is an open source self-hosted server for source code parsing. In bblfshd before commit 4265465b9b6fb5663c30ee43806126012066aad4 there is a "zipslip" vulnerability. The unsafe handling of symbolic links in an unpacking routine may enable attackers to read and/or write to arbitrary locations outside the designated target folder. This issue may lead to arbitrary file write (with same permissions as the program running the unpack operation) if the attacker can control the archive file. Additionally, if the attacker has read access to the unpacked files, he may be able to read arbitrary system files the parent process has permissions to read. For more details including a PoC see the referenced GHSL-2020-258.

Frequently asked questions

What is CVE-2021-32825?: bblfshd is an open source self-hosted server for source code parsing. In bblfshd before commit 4265465b9b6fb5663c30ee43806126012066aad4 there is a "zipslip" vulnerability. The unsafe handling of symbolic links in an unpacking routine may enable attackers to read and/or write to arbitrary locations outside the designated target folder. This issue may lead to arbitrary file write (with same permissions as the program running the unpack operation) if the attacker can control the archive file. Additionally, if the attacker has read access to the unpacked files, he may be able to read arbitrary system files the parent process has permissions to read. For more details including a PoC see the referenced GHSL-2020-258.
How severe is CVE-2021-32825?: CVE-2021-32825 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-32825 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32825?: CVE-2021-32825 affects Bblfshd Project Bblfshd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32825?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-32825 published?: CVE-2021-32825 was published on 2021-08-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:bblfshd_project:bblfshd:*:*:*:*:*:*:*:*

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