CVE-2020-15250

MEDIUM

JUnit4 4.7-4.13 - Local Information Disclosure via TemporaryFolder Rule

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2020-15250. PoCs published by dawetmaster, andikahilmy.

AI-analyzed exploit summary This repository appears to be a fork of the JUnit 4 project with no actual exploit code or proof-of-concept for CVE-2020-15250. It contains standard project files, documentation, and source code but lacks any demonstration of the vulnerability.

Description

In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.

Exploits (2)

nomisec STUB
by dawetmaster · poc
https://github.com/dawetmaster/CVE-2020-15250-junit4-vulnerable

This repository appears to be a fork of the JUnit 4 project with no actual exploit code or proof-of-concept for CVE-2020-15250. It contains standard project files, documentation, and source code but lacks any demonstration of the vulnerability.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: JUnit 4
No auth needed
Prerequisites: None
devstral-2 · analyzed Mar 14, 2026 Full analysis →
nomisec STUB
by andikahilmy · poc
https://github.com/andikahilmy/CVE-2020-15250-junit4-vulnerable

This repository appears to be a fork of the JUnit 4 project with no explicit exploit code or technical analysis related to CVE-2020-15250. It contains standard project files, documentation, and source code but lacks any proof-of-concept exploit or detailed vulnerability writeup.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: JUnit 4
No auth needed
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (39)

Core 39
Core References
Exploit, Third Party Advisory x_refsource_confirm
https://github.com/junit-team/junit4/security/advisories/GHSA-269g-pwp5-87pp
Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/junit-team/junit4/issues/1676
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/11/msg00003.html
Patch, Third Party Advisory x_refsource_misc
https://www.oracle.com/security-alerts/cpuapr2022.html

Scores

CVSS v3 4.4
EPSS 0.0167
EPSS Percentile 73.8%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N

Details

CWE
CWE-200 CWE-732
Status published
Products (5)
apache/pluto < 3.1.1
debian/debian_linux 9.0
junit/junit 4.7 - 4.13.1Maven
junit/junit4 4.7 - 4.13.1
oracle/communications_cloud_native_core_policy 1.14.0
Published Oct 12, 2020
Tracked Since Feb 18, 2026