CVE-2020-29582
Incorrect Default Permissions in JetBrains Kotlin
In JetBrains Kotlin before 1.4.21, a vulnerable Java API was used for temporary file and folder creation. An attacker was able to read data from such files and list directories due to insecure permissions.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In JetBrains Kotlin before 1.4.21, a vulnerable Java API was used for temporary file and folder creation. An attacker was able to read data from such files and list directories due to insecure permissions.
- Record
CVE-2020-29582- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-276
- Updated
- 2026-11-02
CVE List No score
In JetBrains Kotlin before 1.4.21, a vulnerable Java API was used for temporary file and folder creation. An attacker was able to read data from such files and list directories due to insecure permissions.
- Record
CVE-2020-29582- Updated
- 2026-11-02
EUVDEUVD-2022-3613 No score
In JetBrains Kotlin before 1.4.21, a vulnerable Java API was used for temporary file and folder creation. An attacker was able to read data from such files and list directories due to insecure permissions.
- Record
EUVD-2022-3613- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-cqj8-47ch-rvvq
Incorrect Default Permissions in JetBrains Kotlin
In JetBrains Kotlin before 1.4.21, a vulnerable Java API was used for temporary file and folder creation. An attacker was able to read data from such files and list directories due to insecure permissions.
- Record
GHSA-cqj8-47ch-rvvq- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-276
- Updated
- 2026-11-02
OSV
In JetBrains Kotlin before 1.4.21, a vulnerable Java API was used for temporary file and folder creation. An attacker was able to read data from such files and list directories due to insecure permissions.
- Record
CVE-2020-29582- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-29582
In JetBrains Kotlin before 1.4.21, a vulnerable Java API was used for temporary file and folder creation. An attacker was able to read data from such files and list directories due to insecure permissions.
- Record
DEBIAN-CVE-2020-29582- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVGHSA-cqj8-47ch-rvvq
Incorrect Default Permissions in JetBrains Kotlin
In JetBrains Kotlin before 1.4.21, a vulnerable Java API was used for temporary file and folder creation. An attacker was able to read data from such files and list directories due to insecure permissions.
- Record
GHSA-cqj8-47ch-rvvq- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-276
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-29582
In JetBrains Kotlin before 1.4.21, a vulnerable Java API was used for temporary file and folder creation. An attacker was able to read data from such files and list directories due to insecure permissions.
- Record
UBUNTU-CVE-2020-29582- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.jetbrains.kotlin:kotlin-stdlibMaven |
through 1.4.20 | 1.4.21 |
kotlinDebian:12 |
All versions, plus listed versions 1.3.31+ds1-11.3.31+ds1-21.3.31+ds1-31.3.31+ds1-41.3.31+ds1-51.3.31+ds1-61.3.31+ds1-7 |
None known |
kotlinDebian:13 |
before 1.3.31+ds1-3 | 1.3.31+ds1-3 |
kotlinDebian:14 |
before 1.3.31+ds1-3 | 1.3.31+ds1-3 |
org.jetbrains.kotlin:kotlin-stdlibMaven |
before 1.4.21, plus listed versions 0.0.1-test-deploy0.0.2-test-deploy0.10.13160.10.1950.10.4 Show 45 moreShow less0.10.7090.10.7700.11.910.11.91.10.11.91.20.11.91.40.12.12180.12.12300.12.2000.12.2130.12.4120.12.6130.13.15130.13.15140.13.15160.14.4490.14.4510.5.11310.5.9980.6.10700.6.13150.6.14110.6.15070.6.15900.6.16030.6.16170.6.16580.6.16700.6.16730.6.1790.6.19100.6.220.6.24510.6.25170.6.310.6.3170.6.3500.6.5940.6.6020.6.690.6.7860.6.8000.6.9120.7.10900.7.115 |
1.4.21 |
kotlinUbuntu:22.04:LTS |
All versions, plus listed versions 1.3.31+~1.0.1+~0.11.12-2 |
None known |
kotlinUbuntu:24.04:LTS |
All versions, plus listed versions 1.3.31+ds1-1build51.3.31+ds1-1ubuntu1 |
None known |
kotlinUbuntu:25.10 |
All versions, plus listed versions 1.3.31+ds1-21.3.31+ds1-3 |
None known |
kotlinUbuntu:26.10 |
All versions, plus listed versions 1.3.31+ds1-3ubuntu11.3.31+ds1-4 |
None known |
kotlinUbuntu:26.04:LTS |
All versions, plus listed versions 1.3.31+ds1-31.3.31+ds1-3ubuntu1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-29582 is a medium vulnerability (CVSS 5.3) in Jetbrains Kotlin, published February 3, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.60%, the 85th percentile. Fixed in org.jetbrains.kotlin:kotlin-stdlib 1.4.21.
References
blog.jetbrains.com
lists.apache.org/thread.html/r2721aba31a8562639c4b937150897e24f78f747cdbda8641c0f659fe%40%3Cusers.kafka.apache.org%3E
oracle.com//security-alerts/cpujul2021.html
Show 7 moreShow less
nvd.nist.gov/vuln/detail/CVE-2020-29582
github.com/advisories/GHSA-cqj8-47ch-rvvq
security-tracker.debian.org/tracker/CVE-2020-29582
ubuntu.com/security/CVE-2020-29582
youtrack.jetbrains.com/issue/KT-42181
cve.org/CVERecord?id=CVE-2020-29582
Left out here: 98 versions. The JSON record has them.