What is the CVSS score of CVE-2021-29425?

CVE-2021-29425 has a CVSS 3.1 base score of 4.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 10.6%.

Is there a public PoC exploit available for CVE-2021-29425?

Yes, a public proof-of-concept exploit is available for CVE-2021-29425. Prioritise patching immediately. EPSS: 10.6%.

Is there a patch available for CVE-2021-29425?

Yes, a patch is available for CVE-2021-29425. Update the affected software to the latest version immediately.

Commons Io CVE-2021-29425

MEDIUM

Improper Input Validation (CWE-20)

2021-04-13 security@apache.org

Apache Path Traversal Debian Oracle Active Iq Unified Manager Debian Linux Weblogic Server Communications Order And Service Management Application Testing Suite Banking Digital Experience Blockchain Platform Communications Application Session Controller Enterprise Session Border Controller Financial Services Analytical Applications Infrastructure Communications Cloud Native Core Unified Data Repository Enterprise Communications Broker Oss Support Tools Communications Cloud Native Core Network Repository Function Communications Cloud Native Core Policy Commerce Guided Search Agile Engineering Data Management Agile Plm Communications Interactive Session Recorder Retail Order Broker Retail Xstore Point Of Service Access Manager Solaris Cluster Banking Platform Communications Contacts Server Primavera Unifier Retail Merchandising System Retail Service Backbone Webcenter Portal Communications Policy Management Insurance Policy Administration Insurance Rules Palette Communications Offline Mediation Controller Communications Pricing Design Center Health Sciences Information Manager Retail Integration Bus Flexcube Core Banking Communications Converged Application Server Service Controller Communications Service Broker Fusion Middleware Mapviewer Rest Data Services Communications Convergence Application Performance Management Communications Design Studio Healthcare Data Repository Utilities Testing Accelerator Communications Diameter Intelligence Hub Retail Assortment Planning Real User Experience Insight Health Sciences Data Management Workbench Communications Billing And Revenue Management Elastic Charging Engine Banking Apis Banking Enterprise Default Management Banking Enterprise Default Managment Banking Party Management Financial Services Model Management And Governance Retail Size Profile Optimization Helidon Commons Io Retail Pricing Netapp

4.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-20 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V2 - Validation and Business Logic Input validation, allowlisting
Impact	CVSS score of 4.8 (MEDIUM). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 10.6% exploitation probability (EPSS)

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AnalysisAI

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. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

maven com.cosium.vet:vet no fix

maven com.diamondq.common:common-thirdparty.jcasbin no fix

maven com.liferay:com.liferay.sass.compiler.jsass no fix

maven com.virjar:ratel-api no fix

maven commons-io:commons-io fix: 2.7

maven net.hasor:cobble-lang no fix

maven org.apache.commons:commons-io no fix

maven org.apache.servicemix.bundles:org.apache.servicemix.bundles.commons-io no fix

maven org.checkerframework.annotatedlib:commons-io fix: 2.7

maven org.smartboot.servlet:servlet-core no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 10 packages in maven

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-20. 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. Affected products include: Apache Commons Io, Debian Debian Linux, Oracle Access Manager, Oracle Agile Engineering Data Management, Oracle Agile Plm. Version information: before 2.7.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 4.8 MEDIUM

AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

DescriptionNVD

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.

Threat Intelligence Overview

EPSS Score

10.6%

Top 5% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC Yes

EPSS 10.6%

Patch available Yes

Active threat Yes

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.