CVE-2021-28055 is a medium-severity (CVSS 6.5) Insufficient Random Values vulnerability in centreon/centreon. O3 Security confirms whether CVE-2021-28055 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Predictable CSRF tokens in centreon/centreon
Real-World Exposure
centreon/centreon🐘centreon/centreon🐘centreon/centreon🐘centreon/centreonReal-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
An issue was discovered in Centreon-Web in Centreon Platform 20.10.0. The anti-CSRF token generation is predictable, which might allow CSRF attacks that add an admin user.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | centreon/centreon | ≥ 20.10.0&&< 20.10.7 | 20.10.7 |
| 🐘Packagist | centreon/centreon | ≥ 20.04.0&&< 20.04.13 | 20.04.13 |
| 🐘Packagist | centreon/centreon | ≥ 19.10.0&&< 19.10.23 | 19.10.23 |
| 🐘Packagist | centreon/centreon | all versions | 2.8.37 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for centreon/centreon. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update centreon/centreon to 20.10.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-28055 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.
How O3 protects you
O3 pinpoints whether CVE-2021-28055 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2021-28055. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2021-28055 in your dependencies?
O3 detects CVE-2021-28055 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.