CVE-2017-1000027: Koozali Foundation SME Server versions 8.x, 9.x, 10.x are vulnerable to an open URL redirect vulnerability in

Routine

MEDIUM 6.1DOWNGRADE

CVE-2017-1000027 is a medium-severity flaw (CVSS 6.1) affecting sme server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Koozali Foundation SME Server versions 8.x, 9.x, 10.x are vulnerable to an open URL redirect vulnerability in the user web login function resulting in unauthorized account access.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.2% (top 33%)
CISA exploited list	No
Weakness	CWE-601
Published	2017-07-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: koozali

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

Am I affected?

Timeline

2017-07-17 13:18 UTCPublished CVE record published
2026-06-17 00:58 UTCUpdated Record last modified

koozali sme server DOWNGRADE

Affected: 8.0 · 9.0 · 9.2 · 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

1. Check installed version

apt-cache policy sme-server || rpm -q sme-server || sme-server --version

2. No fixed release: DOWNGRADE to a release before 8.0 (Debian / Ubuntu)

apt-cache madison sme-server sudo apt install sme-server=<VERSION_BEFORE_8.0> sudo apt-mark hold sme-server

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

dnf --showduplicates list sme-server sudo dnf downgrade sme-server-<VERSION_BEFORE_8.0> sudo dnf versionlock add sme-server

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-2017-1000027?

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

Is CVE-2017-1000027 being exploited?

CVE-2017-1000027 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-2017-1000027 affect?

CVE-2017-1000027 affects sme server. Severity is medium (CVSS 6.1). Koozali Foundation SME Server versions 8.x, 9.x, 10.x are vulnerable to an open URL redirect vulnerability in the user web login function resulting in unauthorized account access.

How urgent is CVE-2017-1000027?

Priority 38/100. No elevated risk signals yet.

References

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