CVE-2019-9651: An issue was discovered in SDCMS V1.7

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2019-9651 is a critical-severity flaw (CVSS 9.8) affecting sdcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in SDCMS V1.7. In the \app\admin\controller\themecontroller.php file, the check_bad() function's filtering is not strict, resulting in PHP code execution. This occurs because some dangerous PHP functions (such as "eval") are blocked but others (such as "system") are not, and because ".php" is blocked but ".PHP" is not blocked.

Why this priority

Critical 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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-94
Published	2019-03-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: sdcms

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

Am I affected?

Timeline

2019-03-11 01:29 UTCPublished CVE record published
2026-06-17 02:44 UTCUpdated Record last modified

sdcms sdcms DOWNGRADE

Affected: 1.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.7

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.7 (Debian / Ubuntu)

apt-cache madison sdcms sudo apt install sdcms=<VERSION_BEFORE_1.7> sudo apt-mark hold sdcms

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

dnf --showduplicates list sdcms sudo dnf downgrade sdcms-<VERSION_BEFORE_1.7> sudo dnf versionlock add sdcms

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-2019-9651?

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

Is CVE-2019-9651 being exploited?

CVE-2019-9651 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-2019-9651 affect?

CVE-2019-9651 affects sdcms. Severity is critical (CVSS 9.8). An issue was discovered in SDCMS V1.7. In the \app\admin\controller\themecontroller.php file, the check_bad() function's filtering is not strict, resulting in PHP code execution. This occurs because some dangerous PHP functions (such as "ev

How urgent is CVE-2019-9651?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2019-9652 HIGH 8.8 DOWNGRADE There is a CSRF in SDCMS V1.7 via an m=admin&c=theme&a=edit request
CVE-2018-19748 HIGH 7.5 DOWNGRADE app/plug/attachment/controller/admincontroller.php in SDCMS 1.6 allows reading arbitrary files via a /?m=plug&
CVE-2018-19520 HIGH 8.8 DOWNGRADE UPGRADE An issue was discovered in SDCMS 1.6 with PHP 5.x
CVE-2018-11004 HIGH 8.8 DOWNGRADE An issue was discovered in SDcms v1.5

References

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