CVE-2018-19748: app/plug/attachment/controller/admincontroller.php in SDCMS 1.6 allows reading arbitrary files via a /?m=plug&

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2018-19748 is a high-severity flaw (CVSS 7.5) affecting sdcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

app/plug/attachment/controller/admincontroller.php in SDCMS 1.6 allows reading arbitrary files via a /?m=plug&c=admin&a=index&p=attachment&root= directory traversal. The value of the root parameter must be base64 encoded (note that base64 encoding, instead of URL encoding, is very rare in a directory traversal attack vector).

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	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-22
Published	2018-11-29
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

2018-11-29 21:29 UTCPublished CVE record published
2026-06-17 01:49 UTCUpdated Record last modified

sdcms sdcms DOWNGRADE

Affected: 1.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.6 (Debian / Ubuntu)

apt-cache madison sdcms sudo apt install sdcms=<VERSION_BEFORE_1.6> sudo apt-mark hold sdcms

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

dnf --showduplicates list sdcms sudo dnf downgrade sdcms-<VERSION_BEFORE_1.6> 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-2018-19748?

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

Is CVE-2018-19748 being exploited?

CVE-2018-19748 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-2018-19748 affect?

CVE-2018-19748 affects sdcms. Severity is high (CVSS 7.5). app/plug/attachment/controller/admincontroller.php in SDCMS 1.6 allows reading arbitrary files via a /?m=plug&c=admin&a=index&p=attachment&root= directory traversal. The value of the root parameter must be base64 encoded (note that base64 e

How urgent is CVE-2018-19748?

Priority 56/100. High 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-2019-9651 CRITICAL 9.8 DOWNGRADE An issue was discovered in SDCMS V1.7
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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