CVE-2001-1011: index2.php in Mambo Site Server 3.0.0 through 3.0.5 allows remote attackers to gain Mambo administrator privil

This week

HIGH 10.0DOWNGRADE

CVE-2001-1011 is a high-severity flaw (CVSS 10.0) affecting mambo site server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

index2.php in Mambo Site Server 3.0.0 through 3.0.5 allows remote attackers to gain Mambo administrator privileges by setting the PHPSESSID parameter and providing the appropriate administrator information in other parameters.

Why this priority

Critical severity
EPSS top 9%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	4.4% (top 9%)
CISA exploited list	No
Published	2001-07-25
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: mambo

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2001-07-25 04:00 UTCPublished CVE record published
2026-06-16 21:55 UTCUpdated Record last modified

mambo mambo site server DOWNGRADE

Affected: 3.0 · 3.0.1 · 3.0.2 · 3.0.3 · 3.0.4 · 3.0.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

1. Check installed version

apt-cache policy mambo-site-server || rpm -q mambo-site-server || mambo-site-server --version

2. No fixed release: DOWNGRADE to a release before 3.0 (Debian / Ubuntu)

apt-cache madison mambo-site-server sudo apt install mambo-site-server=<VERSION_BEFORE_3.0> sudo apt-mark hold mambo-site-server

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

dnf --showduplicates list mambo-site-server sudo dnf downgrade mambo-site-server-<VERSION_BEFORE_3.0> sudo dnf versionlock add mambo-site-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-2001-1011?

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

Is CVE-2001-1011 being exploited?

CVE-2001-1011 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-2001-1011 affect?

CVE-2001-1011 affects mambo site server. Severity is high (CVSS 10.0). index2.php in Mambo Site Server 3.0.0 through 3.0.5 allows remote attackers to gain Mambo administrator privileges by setting the PHPSESSID parameter and providing the appropriate administrator information in other parameters.

How urgent is CVE-2001-1011?

Priority 63/100. Critical severity; EPSS top 9%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

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References

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