CVE-2011-4943 is a critical-severity (CVSS 9.8) remote code execution vulnerability in impresspages/impresspages. A fix is available for impresspages/impresspages — see the affected versions and patch details below.
ImpressPages CMS RCE
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
impresspages/impresspagesReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
ImpressPages CMS v1.0.12 has Unspecified Remote Code Execution (fixed in v1.0.13)
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | impresspages/impresspages | all versions | 1.0.13composer require impresspages/impresspages:^1.0.13 |
Affected Products
impresspages cmsimpresspagesDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for impresspages/impresspages, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update impresspages/impresspages to 1.0.13 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2011-4943 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is CVE-2011-4943 in your dependencies?
Find it across Packagist, including transitive dependencies.