CVE-2018-21246
9.8
CRITICAL · CVSS 3.1 · EPSS 2.7% (pctl 86)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
Caddy before 0.10.13 mishandles TLS client authentication, as demonstrated by an authentication bypass caused by the lack of the StrictHostMatching mode.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 2.72% — more likely to be exploited than 86% of all CVEs |
| Weakness | CWE-287 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2020-06-15 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| caddyserver | caddy |
References
→ the Explorer · watch your stack · NVD