What is CVE-2022-28923?

CVE-2022-28923 is a medium-severity vulnerability in Caddyserver Caddy, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2023-02-06.

How severe is CVE-2022-28923?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2022-28923 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Open Redirect in Caddyserver Caddy

CVE-2022-28923

Caddy v2.4.6 was discovered to contain an open redirection vulnerability which allows attackers to redirect users to phishing websites via crafted URLs.

Vulnerability class: Open Redirect

Published 2023-02-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.014 (72.6th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Caddyserver Caddy — versions 2.4.6

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

Public proof-of-concept exploits

References

lednerb.de/en/publications/responsible-disclosure/caddy-open-redirect-vulnerabi… (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-28923?: CVE-2022-28923 is a medium-severity vulnerability in Caddyserver Caddy, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2023-02-06.
How severe is CVE-2022-28923?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2022-28923 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.