CVE-2021-28055 is a medium-severity (CVSS 6.5) Insufficient Random Values vulnerability in centreon/centreon. A fix is available for centreon/centreon — see the affected versions and patch details below.
Predictable CSRF tokens in centreon/centreon
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2021-28055 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 385,386 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
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 | 20.10.7composer require centreon/centreon:^20.10.7 |
| 🐘Packagist | centreon/centreon | ≥ 20.04.0&&< 20.04.13 | 20.04.13composer require centreon/centreon:^20.04.13 |
| 🐘Packagist | centreon/centreon | ≥ 19.10.0&&< 19.10.23 | 19.10.23composer require centreon/centreon:^19.10.23 |
| 🐘Packagist | centreon/centreon | all versions | 2.8.37composer require centreon/centreon:^2.8.37 |
Affected Products
centreoncentreonDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for centreon/centreon, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
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.
Frequently Asked Questions
Is CVE-2021-28055 in your dependencies?
Find it across Packagist, including transitive dependencies.