CVE-2019-11401: A issue was discovered in SiteServer CMS 6.9.0

This month

HIGH 7.2DOWNGRADE

CVE-2019-11401 is a high-severity flaw (CVSS 7.2) affecting siteserver cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A issue was discovered in SiteServer CMS 6.9.0. It allows remote attackers to execute arbitrary code because an administrator can add the permitted file extension .aassp, which is converted to .asp because the "as" substring is deleted.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	2.8% (top 13%)
CISA exploited list	No
Weakness	CWE-434
Published	2019-04-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: siteserver

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

Am I affected?

Timeline

2019-04-22 11:29 UTCPublished CVE record published
2026-06-17 02:12 UTCUpdated Record last modified

siteserver siteserver cms DOWNGRADE

Affected: 6.9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.9.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 6.9.0 (Debian / Ubuntu)

apt-cache madison siteserver-cms sudo apt install siteserver-cms=<VERSION_BEFORE_6.9.0> sudo apt-mark hold siteserver-cms

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

dnf --showduplicates list siteserver-cms sudo dnf downgrade siteserver-cms-<VERSION_BEFORE_6.9.0> sudo dnf versionlock add siteserver-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-2019-11401?

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

Is CVE-2019-11401 being exploited?

CVE-2019-11401 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-2019-11401 affect?

CVE-2019-11401 affects siteserver cms. Severity is high (CVSS 7.2). A issue was discovered in SiteServer CMS 6.9.0. It allows remote attackers to execute arbitrary code because an administrator can add the permitted file extension .aassp, which is converted to .asp because the "as" substring is deleted.

How urgent is CVE-2019-11401?

Priority 52/100. High severity; Public exploit reference

Related CVEs

CVE-2022-28118 CRITICAL 9.8 UPGRADE SiteServer CMS v7.x allows attackers to execute arbitrary code via a crafted plug-in.
CVE-2025-45529 HIGH 7.1 DOWNGRADE An arbitrary file read vulnerability in the ReadTextAsynchronous function of SSCMS v7.3.1 allows attackers to
CVE-2023-2862 LOW 3.5 UPGRADE A vulnerability, which was classified as problematic, was found in SiteServer CMS up to 7.2.1
CVE-2022-44299 MEDIUM 4.9 DOWNGRADE SiteServerCMS 7.1.3 sscms has a file read vulnerability.
CVE-2022-44298 CRITICAL 9.8 DOWNGRADE SiteServer CMS 7.1.3 is vulnerable to SQL Injection.

References

← Back to latest CVEs