How severe is CVE-2025-27553?

CVE-2025-27553 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 high, integrity none, and availability none.

Is CVE-2025-27553 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27553?

CVE-2025-27553 affects Apache Commons Vfs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27553?

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.

Does CVE-2025-27553 have an EU (EUVD) identifier?

Yes. CVE-2025-27553 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7319.

When was CVE-2025-27553 published?

CVE-2025-27553 was published on 2025-03-23 and last updated on 2026-06-17.

CVE-2025-27553

CVE-2025-27553 is a high-severity vulnerability in Apache Commons Vfs with a CVSS 3.x base score of 7.5. 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-23.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-7319
Weakness: CWE-23
Affected product: Apache Commons Vfs
Published: 2025-03-23
Last modified: 2026-06-17

Description

Relative Path Traversal vulnerability in Apache Commons VFS before 2.10.0. The FileObject API in Commons VFS has a 'resolveFile' method that takes a 'scope' parameter. Specifying 'NameScope.DESCENDENT' promises that "an exception is thrown if the resolved file is not a descendent of the base file". However, when the path contains encoded ".." characters (for example, "%2E%2E/bar.txt"), it might return file objects that are not a descendent of the base file, without throwing an exception. This issue affects Apache Commons VFS: before 2.10.0. Users are recommended to upgrade to version 2.10.0, which fixes the issue.

Frequently asked questions

What is CVE-2025-27553?: Relative Path Traversal vulnerability in Apache Commons VFS before 2.10.0. The FileObject API in Commons VFS has a 'resolveFile' method that takes a 'scope' parameter. Specifying 'NameScope.DESCENDENT' promises that "an exception is thrown if the resolved file is not a descendent of the base file". However, when the path contains encoded ".." characters (for example, "%2E%2E/bar.txt"), it might return file objects that are not a descendent of the base file, without throwing an exception. This issue affects Apache Commons VFS: before 2.10.0. Users are recommended to upgrade to version 2.10.0, which fixes the issue.
How severe is CVE-2025-27553?: CVE-2025-27553 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 high, integrity none, and availability none.
Is CVE-2025-27553 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27553?: CVE-2025-27553 affects Apache Commons Vfs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27553?: 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.
Does CVE-2025-27553 have an EU (EUVD) identifier?: Yes. CVE-2025-27553 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7319.
When was CVE-2025-27553 published?: CVE-2025-27553 was published on 2025-03-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:commons_vfs:*:*:*:*:*:*:*:*

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