CVE-2011-4943: ImpressPages CMS v1.0.12 has Unspecified Remote Code Execution (fixed in v1.0.13)

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2011-4943 is a critical-severity flaw (CVSS 9.8) affecting impresspages cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ImpressPages CMS v1.0.12 has Unspecified Remote Code Execution (fixed in v1.0.13)

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	1.8% (top 21%)
CISA exploited list	No
Published	2020-01-22
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: impresspages

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

Am I affected?

Timeline

2020-01-22 13:15 UTCPublished CVE record published
2026-06-16 23:35 UTCUpdated Record last modified

impresspages impresspages cms DOWNGRADE

Affected: 1.0.12

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.12

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.12 (Debian / Ubuntu)

apt-cache madison impresspages-cms sudo apt install impresspages-cms=<VERSION_BEFORE_1.0.12> sudo apt-mark hold impresspages-cms

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

dnf --showduplicates list impresspages-cms sudo dnf downgrade impresspages-cms-<VERSION_BEFORE_1.0.12> sudo dnf versionlock add impresspages-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-2011-4943?

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

Is CVE-2011-4943 being exploited?

CVE-2011-4943 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-2011-4943 affect?

CVE-2011-4943 affects impresspages cms. Severity is critical (CVSS 9.8). ImpressPages CMS v1.0.12 has Unspecified Remote Code Execution (fixed in v1.0.13)

How urgent is CVE-2011-4943?

Priority 59/100. Critical severity; Remotely exploitable, no login, no user action

References

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