GHSA-7h24-c332-p48c · Severity: high · Ecosystem: rust — vproxy Divide by Zero DoS Vulnerability
vproxy is an HTTP/HTTPS/SOCKS5 proxy server. In versions 2.3.3 and below, untrusted data is extracted from the user-controlled HTTP Proxy-Authorization header and passed to Extension::try_from and flows into parse_ttl_extension where it is parsed as a TTL value. If an attacker supplies a TTL of zero (e.g. by using a username such as 'configuredUser-ttl-0'), the modulo operation 'timestamp % ttl' will cause a division by zero panic, causing the server to crash causing a denial-of-service. This is fixed in version 2.4.0.
Conclusion & alert: CVE-2025-54581 is rated Moderate Risk (51.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.38%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-26 | 0.06% | 0.38% | +0.32% |
| 2 | 2026-01-07 | 0.05% | 0.06% | +0.01% |
| 3 | 2025-12-27 | — | 0.05% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-7h24-c332-p48c · Severity: high · Ecosystem: rust — vproxy Divide by Zero DoS Vulnerability
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||