CVE-2023-2531 is a high-severity (CVSS 7.3) CWE-307 vulnerability in azuracast/azuracast. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for azuracast/azuracast — see the affected versions and patch details below.
Improper Restriction of Excessive Authentication Attempts in azuracast/azuracast
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA’s SSVC triage for CVE-2023-2531.
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
azuracast/azuracastReal-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
The request rate limiting feature on the login page of AzuraCast before version 0.18.3 can be bypassed, which could allow an attacker to brute force login credentials.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | azuracast/azuracast | all versions | 0.18.3composer require azuracast/azuracast:^0.18.3 |
Affected Products
azuracastazuracastResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for azuracast/azuracast, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update azuracast/azuracast to 0.18.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-2531 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-2023-2531 in your dependencies?
Find it across Packagist, including transitive dependencies.