CVE-2018-14977: An issue was discovered in QCMS 3.0.1

Routine

MEDIUM 6.1DOWNGRADE

CVE-2018-14977 is a medium-severity flaw (CVSS 6.1) affecting qcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in QCMS 3.0.1. upload/System/Controller/guest.php has XSS, as demonstrated by the name parameter, a different vulnerability than CVE-2018-8070.

Why this priority

Public exploit reference

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	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-08-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: q-cms

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

Am I affected?

Timeline

2018-08-06 15:29 UTCPublished CVE record published
2026-06-17 01:42 UTCUpdated Record last modified

q-cms qcms DOWNGRADE

Affected: 3.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.0.1 (Debian / Ubuntu)

apt-cache madison qcms sudo apt install qcms=<VERSION_BEFORE_3.0.1> sudo apt-mark hold qcms

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

dnf --showduplicates list qcms sudo dnf downgrade qcms-<VERSION_BEFORE_3.0.1> sudo dnf versionlock add qcms

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-2018-14977?

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

Is CVE-2018-14977 being exploited?

CVE-2018-14977 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-2018-14977 affect?

CVE-2018-14977 affects qcms. Severity is medium (CVSS 6.1). An issue was discovered in QCMS 3.0.1. upload/System/Controller/guest.php has XSS, as demonstrated by the name parameter, a different vulnerability than CVE-2018-8070.

How urgent is CVE-2018-14977?

Priority 39/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2025-50233 MEDIUM 6.5 DOWNGRADE A vulnerability in QCMS version 6.0.5 allows authenticated users to read arbitrary files from the server due t
CVE-2020-10578 HIGH 7.5 DOWNGRADE An arbitrary file read vulnerability exists in system/controller/backend/template.php in QCMS v3.0.1.
CVE-2018-8070 MEDIUM 5.4 DOWNGRADE QCMS version 3.0 has XSS via the title parameter to the /guest/index.html URI.
CVE-2018-8069 MEDIUM 5.4 DOWNGRADE QCMS version 3.0 has XSS via the webname parameter to the /backend/system.html URI.
CVE-2018-14978 HIGH 8.8 DOWNGRADE An issue was discovered in QCMS 3.0.1

References

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