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CVE-2020-17534

Improper synchronization in Apache Netbeans HTML/Java API

7.0 HighFix available

There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in webkit subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file: https://github.com/apache/netbeans-html4j/commit/fa70e507e5555e1adb4f6518479fc408a7abd0e6

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.41%Down 0.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.0

There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in webkit subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file: https://github.com/apache/netbeans-html4j/commit/fa70e507e5555e1adb4f6518479fc408a7abd0e6

Record
CVE-2020-17534
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
4.4 MediumAV:L/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-362
Updated
2026-11-02
CVE List No score

There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in webkit subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file: https://github.com/apache/netbeans-html4j/commit/fa70e507e5555e1adb4f6518479fc408a7abd0e6

Record
CVE-2020-17534
Updated
2026-11-02
EUVDEUVD-2022-1131 No score

There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in webkit subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file: https://github.com/apache/netbeans-html4j/commit/fa70e507e5555e1adb4f6518479fc408a7abd0e6

Record
EUVD-2022-1131
Updated
2026-11-03
GitHub AdvisoriesGHSA-ppc3-fpvh-7396 7.0

Improper synchronization in Apache Netbeans HTML/Java API

There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in webkit subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file.

Record
GHSA-ppc3-fpvh-7396
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-362
Updated
2026-11-02
OSV 7.0

There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in webkit subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file: https://github.com/apache/netbeans-html4j/commit/fa70e507e5555e1adb4f6518479fc408a7abd0e6

Record
CVE-2020-17534
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVGHSA-ppc3-fpvh-7396 7.0

Improper synchronization in Apache Netbeans HTML/Java API

There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in webkit subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file.

Record
GHSA-ppc3-fpvh-7396
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-362
Updated
2026-11-02
OSVUBUNTU-CVE-2020-17534 7.0

There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in webkit subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file: https://github.com/apache/netbeans-html4j/commit/fa70e507e5555e1adb4f6518479fc408a7abd0e6

Record
UBUNTU-CVE-2020-17534
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
org.netbeans.html:pom
Maven
 before 1.7.1
1.7.1
org.netbeans.html:pom
Maven
 before 1.7.1, plus listed versions
0.70.7.10.7.50.7.60.8
Show 17 moreShow less
0.8.10.8.20.8.30.91.01.11.21.2.11.2.21.2.31.31.41.51.5.11.61.6.11.7
1.7.1
netbeans
Ubuntu:16.04:LTS
 All versions, plus listed versions
8.0.2+dfsg1-48.0.2+dfsg1-58.1+dfsg1-18.1+dfsg2-18.1+dfsg2-3
 None known
netbeans
Ubuntu:18.04:LTS
 All versions, plus listed versions
8.1+dfsg3-410.0-3~18.04.1ubuntu110.0-3ubuntu2~18.04.1
 None known
netbeans
Ubuntu:20.04:LTS
 All versions, plus listed versions
10.0-3ubuntu3
 None known
netbeans
Ubuntu:22.04:LTS
 All versions, plus listed versions
12.1-3
 None known
netbeans
Ubuntu:24.04:LTS
 All versions, plus listed versions
12.1-3
 None known
netbeans
Ubuntu:25.10
 All versions, plus listed versions
12.1-3
 None known
netbeans
Ubuntu:26.10
 All versions, plus listed versions
12.1-3build1
 None known
netbeans
Ubuntu:26.04:LTS
 All versions, plus listed versions
12.1-312.1-3build1
 None known

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-17534 is a high vulnerability (CVSS 7.0) in Apache Html\/java Api, published January 11, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. Fixed in org.netbeans.html:pom 1.7.1.

References

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