MEDIUM
CVE-2021-29425
CWE-20Published: April 13, 2021· Updated: Jun 17, 2026
4.8
CVSS v3.1
Official 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.
Technical Analysis
CVE-2021-29425 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected Vendors & Products
Apache1 product(s)
commons io
Debian1 product(s)
debian linux
netapp1 product(s)
active iq unified manager
Oracle57 product(s)
access manageragile engineering data managementagile plmapplication performance managementapplication testing suitebanking apisbanking digital experiencebanking enterprise default managementbanking enterprise default managmentbanking party managementbanking platformblockchain platform+45
Source: NVD CPE · 133 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (94)
→
https://issues.apache.org/jira/browse/IO-556Exploit · Issue Tracking · Vendor Advisory
Quick Facts
CVE IDCVE-2021-29425
CVSS Score4.8 / 10
SeverityMEDIUM
WeaknessCWE-20
CISA KEVNo
Affected4 vendor(s)
PublishedApr 13, 2021
Related CVEs (CWE-20)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-29425 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.