CVE-2025-51489: A Stored Cross-Site Scripting (XSS) vulnerability exists in MoonShine version < 3.12.5, allowing remote attack

Q: How do I fix CVE-2025-51489?

moonshine: upgrade to 3.12.5. Exact commands for each OS are on this page.

Q: Is CVE-2025-51489 being exploited?

CVE-2025-51489 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-2025-51489 affect?

CVE-2025-51489 affects moonshine. Severity is medium (CVSS 5.4). A Stored Cross-Site Scripting (XSS) vulnerability exists in MoonShine version < 3.12.5, allowing remote attackers to upload a malicious SVG file when creating/updating an Article and correctly execute arbitrary JavaScript when the file link

Q: How urgent is CVE-2025-51489?

Priority 31/100. Public exploit reference

Routine

MEDIUM 5.4UPGRADE

CVE-2025-51489 is a medium-severity flaw (CVSS 5.4) affecting moonshine. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A Stored Cross-Site Scripting (XSS) vulnerability exists in MoonShine version < 3.12.5, allowing remote attackers to upload a malicious SVG file when creating/updating an Article and correctly execute arbitrary JavaScript when the file link is opened.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-79, CWE-434
Published	2025-08-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: moonshine

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

Am I affected?

Timeline

2025-08-19 15:15 UTCPublished CVE record published
2026-06-17 09:35 UTCUpdated Record last modified

moonshine moonshine UPGRADE

Affected: < 3.12.5

Fixed in: 3.12.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.12.5 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade moonshine

Note

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

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-2025-51489?

moonshine: upgrade to 3.12.5. Exact commands for each OS are on this page.

Is CVE-2025-51489 being exploited?

CVE-2025-51489 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-2025-51489 affect?

CVE-2025-51489 affects moonshine. Severity is medium (CVSS 5.4). A Stored Cross-Site Scripting (XSS) vulnerability exists in MoonShine version < 3.12.5, allowing remote attackers to upload a malicious SVG file when creating/updating an Article and correctly execute arbitrary JavaScript when the file link

How urgent is CVE-2025-51489?

Priority 31/100. Public exploit reference

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References

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