Reference page — cumulative record through Thursday, October 8, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Apache Software Foundation Apache Commons IO — Possible limited path traversal vulnerabily in Apache Commons IO
AV AC PR UI S C I A CVSS EPSS %ile KEV
N H N N U L L N 4.8 .0990 95.5 —
AFFECTED
Product Versions Fixed
Apache Commons IO Apache Commons IO 2.2 – —
TIMELINE
Mar 30 Reserved by apache
Apr 13 Published (CNA: apache)
Oct 7 EXPLOIT PUBLISHED — CVE-2021-29425 (Apache Software Foundation Apache Commons IO). Public exploit reference added.
Oct 7 RESCORED — CVE-2021-29425 (Apache Software Foundation Apache Commons IO). CVSS 6.5 → 4.8 (NVD).
Description
In Apache Commons IO before 2.7, When invoking the method FileNameUtils.normalize with an improper input string, like "//../foo", or "\\..\foo", the result would be the same value, thus possibly providing access to files in the parent directory, but not further above (thus "limited" path traversal), if the calling code would use the result to construct a path value.
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-29425 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Thursday, October 8, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
