CVE-2023-50463 json
Header spoofing in caddy-geo-ip
published 2023-12-10 2 y ago modified 2026-06-17 4 mo ago also GHSA-rxg9-hgq7-8pwx , GO-2023-2394 , EUVD-2023-3297
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
The caddy-geo-ip (aka GeoIP) middleware through 0.6.0 for Caddy 2, when trust_header X-Forwarded-For is used, allows attackers to spoof their source IP address via an X-Forwarded-For header, which may bypass a protection mechanism (trusted_proxy directive in reverse_proxy or IP address range restrictions).
Exploit prediction
0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/shift72/caddy-geo-ip | <=0.6.0 all versions |
no fix listed |
Classification
- Weakness
-
- CWE-290 Authentication Bypass by Spoofing
References
-
github.com
/shift72/caddy-geo-ip/issues/4
web, third-party-advisory, report
-
github.com
/shift72/caddy-geo-ip/tags
web, release-notes
-
caddyserver.com
/v2
web, broken-link
-
nvd.nist.gov
/vuln/detail/CVE-2023-50463
advisory
Sources
- CVE List CVE-2023-50463
- GitHub Advisory GHSA-rxg9-hgq7-8pwx
- NVD CVE-2023-50463
- OSV GO-2023-2394
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.