CVE-2023-26511: A Hard Coded Admin Credentials issue in the Web-UI Admin Panel in Propius MachineSelector 6.6.0 and 6.6.1 allo

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2023-26511 is a critical-severity flaw (CVSS 9.8) affecting machineselector. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A Hard Coded Admin Credentials issue in the Web-UI Admin Panel in Propius MachineSelector 6.6.0 and 6.6.1 allows remote attackers to gain access to the admin panel Propiusadmin.php, which allows taking control of the affected system.

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	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-798
Published	2023-03-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: propius

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

Am I affected?

Timeline

2023-03-14 21:15 UTCPublished CVE record published
2026-06-17 05:43 UTCUpdated Record last modified

propius machineselector DOWNGRADE

Affected: 6.6.0 · 6.6.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.6.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 6.6.0 (Debian / Ubuntu)

apt-cache madison machineselector sudo apt install machineselector=<VERSION_BEFORE_6.6.0> sudo apt-mark hold machineselector

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

dnf --showduplicates list machineselector sudo dnf downgrade machineselector-<VERSION_BEFORE_6.6.0> sudo dnf versionlock add machineselector

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-2023-26511?

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

Is CVE-2023-26511 being exploited?

CVE-2023-26511 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-2023-26511 affect?

CVE-2023-26511 affects machineselector. Severity is critical (CVSS 9.8). A Hard Coded Admin Credentials issue in the Web-UI Admin Panel in Propius MachineSelector 6.6.0 and 6.6.1 allows remote attackers to gain access to the admin panel Propiusadmin.php, which allows taking control of the affected system.

How urgent is CVE-2023-26511?

Priority 54/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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