CVE-2025-27553 | Apache Commons VFS: Possible path traversal issue when using NameScope.DESCENDENT

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.

Published: 2025-03-23 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-27553 is rated Moderate Risk (53.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.28%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-27553

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-24 1.19% 1.28% +0.09%
2 2026-06-15 0.85% 1.19% +0.34%
3 2026-06-12 — 0.85% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-27553

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-27553

GitHub Security Advisory for CVE-2025-27553

GHSA-9q4x-fr4m-jp86 · Severity: high · Ecosystem: maven — Apache Commons VFS Has Relative Path Traversal Vulnerability

OS Trackers for CVE-2025-27553

vendor priority summary link
debian not yet assigned CVE-2025-27553 not yet assigned priority: Debian including 1 source packages (commons-vfs), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2025-27553
redhat medium — https://access.redhat.com/security/cve/CVE-2025-27553
suse medium — https://www.suse.com/security/cve/CVE-2025-27553/
ubuntu medium CVE-2025-27553 medium priority: Ubuntu including 1 source packages (commons-vfs), 9 status rows across 9 suites (bionic, focal, jammy, noble, oracular, plucky, questing, upstream, xenial): needs-triage 7, ignored 2. https://ubuntu.com/security/CVE-2025-27553

Affected software / configurations for CVE-2025-27553

Vendor Product Version Raw CPE
apache commons_vfs < 2.10.0 cpe:2.3:a:apache:commons_vfs:*:*:*:*:*:*:*:*

References for CVE-2025-27553

cvelogic Threat Intelligence