CVE-2019-15748: SITOS six Build v6.2.1 permits unauthorised users to upload and import a SCORM 2004 package by browsing direct

This month

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2019-15748 is a critical-severity flaw (CVSS 9.8) affecting sitos six. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SITOS six Build v6.2.1 permits unauthorised users to upload and import a SCORM 2004 package by browsing directly to affected pages. An unauthenticated attacker could use the upload and import functionality to import a malicious SCORM package that includes a PHP file, which could execute arbitrary PHP code.

Why this priority

Critical severity
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	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-434
Published	2019-10-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: sitos

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

Am I affected?

Timeline

2019-10-07 12:15 UTCPublished CVE record published
2026-06-17 02:21 UTCUpdated Record last modified

sitos sitos six DOWNGRADE

Affected: 6.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.2.1

1. Check installed version

apt-cache policy sitos-six || rpm -q sitos-six || sitos-six --version

2. No fixed release: DOWNGRADE to a release before 6.2.1 (Debian / Ubuntu)

apt-cache madison sitos-six sudo apt install sitos-six=<VERSION_BEFORE_6.2.1> sudo apt-mark hold sitos-six

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

dnf --showduplicates list sitos-six sudo dnf downgrade sitos-six-<VERSION_BEFORE_6.2.1> sudo dnf versionlock add sitos-six

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-2019-15748?

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

Is CVE-2019-15748 being exploited?

CVE-2019-15748 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-2019-15748 affect?

CVE-2019-15748 affects sitos six. Severity is critical (CVSS 9.8). SITOS six Build v6.2.1 permits unauthorised users to upload and import a SCORM 2004 package by browsing directly to affected pages. An unauthenticated attacker could use the upload and import functionality to import a malicious SCORM packag

How urgent is CVE-2019-15748?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

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CVE-2019-15749 MEDIUM 6.5 DOWNGRADE SITOS six Build v6.2.1 allows a user to change their password and recovery email address without requiring the
CVE-2019-15747 HIGH 8.8 DOWNGRADE SITOS six Build v6.2.1 allows a user with the user role of Seminar Coordinator to escalate their permission to
CVE-2019-15746 CRITICAL 9.8 DOWNGRADE SITOS six Build v6.2.1 allows an attacker to inject arbitrary PHP commands

References

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