CVE-2025-54175: QuickCMS.EXT is vulnerable to Reflected XSS in sFileName parameter in thumbnail viewer functionality

Routine

MEDIUM 6.1DOWNGRADE

CVE-2025-54175 is a medium-severity flaw (CVSS 6.1) affecting quick.cms.ext. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

QuickCMS.EXT is vulnerable to Reflected XSS in sFileName parameter in thumbnail viewer functionality. An attacker can craft a malicious URL that results in arbitrary JavaScript execution in the victim's browser when opened. The vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Only version 6.8 was tested and confirmed as vulnerable, other versions were not teste

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-08-20
Last modified	2026-06-17

Publisher (CNA): CERT.PL · Vendor: opensolution

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

Am I affected?

Timeline

2025-08-20 13:15 UTCPublished CVE record published
2026-06-17 09:39 UTCUpdated Record last modified

opensolution quick.cms.ext DOWNGRADE

Affected: 6.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.8

1. Check installed version

apt-cache policy quick.cms.ext || rpm -q quick.cms.ext || quick.cms.ext --version

2. No fixed release: DOWNGRADE to a release before 6.8 (Debian / Ubuntu)

apt-cache madison quick.cms.ext sudo apt install quick.cms.ext=<VERSION_BEFORE_6.8> sudo apt-mark hold quick.cms.ext

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list quick.cms.ext sudo dnf downgrade quick.cms.ext-<VERSION_BEFORE_6.8> sudo dnf versionlock add quick.cms.ext

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2025-54175?

quick.cms.ext: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-54175 being exploited?

CVE-2025-54175 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-2025-54175 affect?

CVE-2025-54175 affects quick.cms.ext. Severity is medium (CVSS 6.1). QuickCMS.EXT is vulnerable to Reflected XSS in sFileName parameter in thumbnail viewer functionality. An attacker can craft a malicious URL that results in arbitrary JavaScript execution in the victim's browser when opened. The vendor was

How urgent is CVE-2025-54175?

Priority 25/100. No elevated risk signals yet.

References

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