CVE-2022-1231: XSS via Embedded SVG in SVG Diagram Format in GitHub repository plantuml/plantuml prior to 1.2022.4

Q: How do I fix CVE-2022-1231?

plantuml: upgrade to 1.2022.4; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2022-1231 being exploited?

CVE-2022-1231 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-1231 affect?

CVE-2022-1231 affects plantuml, fedora. Severity is medium (CVSS 6.1). XSS via Embedded SVG in SVG Diagram Format in GitHub repository plantuml/plantuml prior to 1.2022.4. Stored XSS in the context of the diagram embedder. Depending on the actual context, this ranges from stealing secrets to account hijacking

Q: How urgent is CVE-2022-1231?

Priority 46/100. Public exploit reference

This month

MEDIUM 6.1UPGRADEMITIGATE

CVE-2022-1231 is a medium-severity flaw (CVSS 6.1) affecting plantuml, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

XSS via Embedded SVG in SVG Diagram Format in GitHub repository plantuml/plantuml prior to 1.2022.4. Stored XSS in the context of the diagram embedder. Depending on the actual context, this ranges from stealing secrets to account hijacking or even to code execution for example in desktop applications. Web based applications are the ones most affected. Since the SVG format allows clickable links in diagrams, it is commonly used in plugins for web

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.0% (top 20%)
CISA exploited list	No
Weakness	CWE-79
Published	2022-04-15
Last modified	2026-06-17

Publisher (CNA): huntr.dev · Vendor: fedoraproject · plantuml

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-04-15 15:15 UTCPublished CVE record published
2026-06-17 04:22 UTCUpdated Record last modified

plantuml plantuml UPGRADE

Affected: < 1.2022.4

Fixed in: 1.2022.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy plantuml || rpm -q plantuml || plantuml --version

2. UPGRADE to 1.2022.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade plantuml

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade plantuml

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

fedoraproject fedora MITIGATE

Affected: 35 · 36

Fixed in: no fixed release known

Safe to downgrade to: a release before 35

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-1231?

plantuml: upgrade to 1.2022.4; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-1231 being exploited?

CVE-2022-1231 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-1231 affect?

CVE-2022-1231 affects plantuml, fedora. Severity is medium (CVSS 6.1). XSS via Embedded SVG in SVG Diagram Format in GitHub repository plantuml/plantuml prior to 1.2022.4. Stored XSS in the context of the diagram embedder. Depending on the actual context, this ranges from stealing secrets to account hijacking

How urgent is CVE-2022-1231?

Priority 46/100. Public exploit reference

Software pages

GitHub vulnerabilities

Related CVEs

CVE-2026-0858 MEDIUM 6.1 UPGRADE Versions of the package net.sourceforge.plantuml:plantuml before 1.2026.0 are vulnerable to Stored XSS due to
CVE-2023-3432 CRITICAL 10.0 UPGRADE MITIGATE Server-Side Request Forgery (SSRF) in GitHub repository plantuml/plantuml prior to 1.2023.9.
CVE-2023-3431 MEDIUM 5.3 UPGRADE MITIGATE Improper Access Control in GitHub repository plantuml/plantuml prior to 1.2023.9.
CVE-2022-1379 CRITICAL 9.1 UPGRADE MITIGATE URL Restriction Bypass in GitHub repository plantuml/plantuml prior to V1.2022.5
CVE-2020-36523 LOW 3.5 DOWNGRADE A vulnerability was found in PlantUML 6.43

References

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