CVE-2023-3431

Improper Access Control in plantuml/plantuml

5.3 MediumFix available

Improper Access Control in GitHub repository plantuml/plantuml prior to 1.2023.9.

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

0.87%Up 0.8 points since Jun 28, 2023

What each source reports

CVE List Score used 5.3

Improper Access Control in plantuml/plantuml

Improper Access Control in GitHub repository plantuml/plantuml prior to 1.2023.9.

Record: CVE-2023-3431
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-284
Updated: 2026-11-02

EUVDEUVD-2023-1850 5.3

Improper Access Control in GitHub repository plantuml/plantuml prior to 1.2023.9.

Record: EUVD-2023-1850
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-p2mf-q26j-3xmh 5.3

PlantUML Improper Access Control vulnerability

Improper Access Control in GitHub repository plantuml/plantuml prior to 1.2023.9.

Record: GHSA-p2mf-q26j-3xmh
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-284
Updated: 2026-11-02

NVD 5.3

Improper Access Control in GitHub repository plantuml/plantuml prior to 1.2023.9.

Record: CVE-2023-3431
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-284
Updated: 2026-11-02

OSV 5.3

Improper Access Control in plantuml/plantuml

Improper Access Control in GitHub repository plantuml/plantuml prior to 1.2023.9.

Record: CVE-2023-3431
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-284
Updated: 2026-11-02

OSVDEBIAN-CVE-2023-3431 5.3

Improper Access Control in GitHub repository plantuml/plantuml prior to 1.2023.9.

Record: DEBIAN-CVE-2023-3431
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVGHSA-p2mf-q26j-3xmh 5.3

PlantUML Improper Access Control vulnerability

Improper Access Control in GitHub repository plantuml/plantuml prior to 1.2023.9.

Record: GHSA-p2mf-q26j-3xmh
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-284
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-3431 5.3

Improper Access Control in GitHub repository plantuml/plantuml prior to 1.2023.9.

Record: UBUNTU-CVE-2023-3431
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`net.sourceforge.plantuml:plantuml-mit` Maven	before 1.2023.9	1.2023.9
`plantuml` Debian:12	All versions, plus listed versions 1:1.2020.2+ds-31:1.2020.2+ds-41:1.2020.2+ds-51:1.2020.2+ds-61:1.2026.2+ds-11:1.2026.2+ds-21:1.2026.2+ds-3	None known
`plantuml` Debian:13	All versions, plus listed versions 1:1.2020.2+ds-61:1.2026.2+ds-11:1.2026.2+ds-21:1.2026.2+ds-3	None known
`plantuml` Debian:14	All versions, plus listed versions 1:1.2020.2+ds-61:1.2026.2+ds-11:1.2026.2+ds-21:1.2026.2+ds-3	None known
`net.sourceforge.plantuml:plantuml-mit` Maven	before 1.2023.9, plus listed versions 1.2023.71.2023.8	1.2023.9
`plantuml` Ubuntu:22.04:LTS	All versions, plus listed versions 1:1.2020.2+ds-11:1.2020.2+ds-1ubuntu0.1	None known
`plantuml` Ubuntu:24.04:LTS	All versions, plus listed versions 1:1.2020.2+ds-31:1.2020.2+ds-3ubuntu11:1.2020.2+ds-3ubuntu1.1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2023-3431 is a medium vulnerability (CVSS 5.3) in Plantuml, published June 27, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.87%, the 58th percentile. Fixed in net.sourceforge.plantuml:plantuml-mit 1.2023.9.

References

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