CVE-2019-11016 — elgg
MEDIUMCVE-2019-11016 is a medium-severity (CVSS 6.1) Open Redirect vulnerability in elgg/elgg. A fix is available for elgg/elgg — see the affected versions and patch details below.
Elgg open redirect
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
elgg/elgg🐘elgg/elggReal-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
Elgg before 1.12.18 and 2.3.x before 2.3.11 has an open redirect.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | elgg/elgg | all versions | 1.12.18composer require elgg/elgg:^1.12.18 |
| 🐘Packagist | elgg/elgg | ≥ 2.3.0&&< 2.3.11 | 2.3.11composer require elgg/elgg:^2.3.11 |
Affected Products
elggelggDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for elgg/elgg, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update elgg/elgg to 1.12.18 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-11016 is resolved across your whole dependency graph.
Workarounds
Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.
Frequently Asked Questions
Is CVE-2019-11016 in your dependencies?
Find it across Packagist, including transitive dependencies.