CVE-2025-15549: FluentCMS 2026 contains a stored cross-site scripting vulnerability that allows authenticated administrators t

Q: How do I fix CVE-2025-15549?

fluentcms: upgrade to newer than 0.0.5. Exact commands for each OS are on this page.

Q: Is CVE-2025-15549 being exploited?

CVE-2025-15549 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-2025-15549 affect?

CVE-2025-15549 affects fluentcms. Severity is medium (CVSS 4.8). FluentCMS 2026 contains a stored cross-site scripting vulnerability that allows authenticated administrators to upload SVG files with embedded JavaScript via the File Management module. Attackers can upload malicious SVG files that execute

Q: How urgent is CVE-2025-15549?

Priority 26/100. Public exploit reference

Routine

MEDIUM 4.8UPGRADE

CVE-2025-15549 is a medium-severity flaw (CVSS 4.8) affecting fluentcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FluentCMS 2026 contains a stored cross-site scripting vulnerability that allows authenticated administrators to upload SVG files with embedded JavaScript via the File Management module. Attackers can upload malicious SVG files that execute JavaScript in the browser of any user accessing the uploaded file URL.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-01-29
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: fluentcms

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

Am I affected?

Timeline

2026-01-29 20:16 UTCPublished CVE record published
2026-06-17 08:38 UTCUpdated Record last modified

fluentcms fluentcms UPGRADE

Affected: <= 0.0.5

Fixed in: newer than 0.0.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 0.0.5 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fluentcms

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-2025-15549?

fluentcms: upgrade to newer than 0.0.5. Exact commands for each OS are on this page.

Is CVE-2025-15549 being exploited?

CVE-2025-15549 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-2025-15549 affect?

CVE-2025-15549 affects fluentcms. Severity is medium (CVSS 4.8). FluentCMS 2026 contains a stored cross-site scripting vulnerability that allows authenticated administrators to upload SVG files with embedded JavaScript via the File Management module. Attackers can upload malicious SVG files that execute

How urgent is CVE-2025-15549?

Priority 26/100. Public exploit reference

Related CVEs

CVE-2025-67349 MEDIUM 6.1 DOWNGRADE A cross-site scripting (XSS) vulnerability was identified in FluentCMS 1.2.3

References

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