CVE-2019-7721: lib/NCCms.class.php in nc-cms 3.5 allows upload of .php files via the index.php?action=save name and editordat

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2019-7721 is a high-severity flaw (CVSS 7.5) affecting nc-cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

lib/NCCms.class.php in nc-cms 3.5 allows upload of .php files via the index.php?action=save name and editordata parameters.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-434
Published	2019-02-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: nconsulting

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

Am I affected?

Timeline

2019-02-11 04:29 UTCPublished CVE record published
2026-06-17 02:40 UTCUpdated Record last modified

nconsulting nc-cms DOWNGRADE

Affected: 3.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5

1. Check installed version

apt-cache policy nc-cms || rpm -q nc-cms || nc-cms --version

2. No fixed release: DOWNGRADE to a release before 3.5 (Debian / Ubuntu)

apt-cache madison nc-cms sudo apt install nc-cms=<VERSION_BEFORE_3.5> sudo apt-mark hold nc-cms

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

dnf --showduplicates list nc-cms sudo dnf downgrade nc-cms-<VERSION_BEFORE_3.5> sudo dnf versionlock add nc-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-2019-7721?

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

Is CVE-2019-7721 being exploited?

CVE-2019-7721 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-2019-7721 affect?

CVE-2019-7721 affects nc-cms. Severity is high (CVSS 7.5). lib/NCCms.class.php in nc-cms 3.5 allows upload of .php files via the index.php?action=save name and editordata parameters.

How urgent is CVE-2019-7721?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2018-18874 CRITICAL 9.8 UPGRADE nc-cms through 2017-03-10 allows remote attackers to execute arbitrary PHP code via the "Upload File or Image"
CVE-2018-18361 MEDIUM 6.1 UPGRADE An issue was discovered in nc-cms through 2017-03-10
CVE-2018-18290 MEDIUM 4.8 UPGRADE An issue was discovered in nc-cms through 2017-03-10

References

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