CVE-2022-28923 Open Redirect in Caddy

What is CVE-2022-28923?

CVE-2022-28923 is a medium-severity vulnerability in n/a, published on 6 Feb 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

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

Weakness: CWE-601

Which versions are affected by CVE-2022-28923?

3 open source packages ship an affected version, including github.com/caddyserver/caddy/v2. It affects 1 product.

Products include Caddyserver Caddy.

How do I fix CVE-2022-28923?

Upgrade github.com/caddyserver/caddy/v2 to 2.5.0-beta.1 or later.

Is CVE-2022-28923 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-28923 exists.

Public exploit code: 1 Nuclei template.

Other vulnerabilities in n/a

• CVE-2018-21246 Caddy vulnerable to Authentication Bypass due to mishandling of TLS client authentication Critical 9.8
• CVE-2026-27590 Caddy: Unicode case-folding length expansion causes incorrect split_path index in FastCGI transport High 8.9
• CVE-2026-27586 Caddy's mTLS client authentication silently fails open when CA certificate file is missing or malformed High 8.8
• CVE-2026-45135 Caddy: Unsafe Unicode Handling in FastCGI splitPos Allows Execution of Non-PHP Files High 8.1
• CVE-2026-52845 Caddy: FastCGI header normalization bypass in `forward_auth copy_headers` High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2022-28923, GHSA-qpm3-vr34-h8w8, GO-2023-1567.