CVE-2025-54543: QuickCMS is vulnerable to Stored XSS via sDescriptionMeta parameter in page editor SEO functionality

Routine

MEDIUM 4.8DOWNGRADE

CVE-2025-54543 is a medium-severity flaw (CVSS 4.8) affecting quick.cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

QuickCMS is vulnerable to Stored XSS via sDescriptionMeta parameter in page editor SEO functionality. Malicious attacker with admin privileges can inject arbitrary HTML and JS into website, which will be rendered/executed when visiting edited page. By default admin user is not able to add JavaScript into the website. The vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-08-28
Last modified	2026-10-18

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

Last updated 2026-10-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-08-28 11:15 UTCPublished CVE record published
2026-10-18 21:10 UTCUpdated Record last modified

opensolution quick.cms 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 || rpm -q quick.cms || quick.cms --version

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

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

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

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

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-2025-54543?

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

Is CVE-2025-54543 being exploited?

CVE-2025-54543 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-2025-54543 affect?

CVE-2025-54543 affects quick.cms. Severity is medium (CVSS 4.8). QuickCMS is vulnerable to Stored XSS via sDescriptionMeta parameter in page editor SEO functionality. Malicious attacker with admin privileges can inject arbitrary HTML and JS into website, which will be rendered/executed when visiting edit

How urgent is CVE-2025-54543?

Priority 19/100. No elevated risk signals yet.

Related CVEs

CVE-2025-54540 MEDIUM 6.1 DOWNGRADE QuickCMS is vulnerable to Reflected XSS via sSort parameter in admin's panel functionality
CVE-2025-55175 MEDIUM 6.1 DOWNGRADE QuickCMS is vulnerable to Reflected XSS via sLangEdit parameter in admin's panel functionality
CVE-2025-54542 MEDIUM 5.5 DOWNGRADE QuickCMS sends password and login via GET Request
CVE-2025-54544 MEDIUM 4.8 DOWNGRADE QuickCMS is vulnerable to Stored XSS via aDirFilesDescriptions parameter in files editor functionality
CVE-2025-54541 MEDIUM 4.3 DOWNGRADE QuickCMS is vulnerable to Cross-Site Request Forgery in page deletion functionality

References

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