CVE-2025-24354: imgproxy is vulnerable to SSRF against 0.0.0.0
Summary
Imgproxy does not block the 0.0.0.0 address, even with IMGPROXYALLOWLOOPBACKSOURCEADDRESSES set to false. This can expose services on the local host.
Details
imgproxy protects against SSRF against a loopback address with the following check (source):
if !config.AllowLoopbackSourceAddresses && ip.IsLoopback() { return ErrSourceAddressNotAllowed }
This check is insufficient to prevent accessing services on the local host, as services may receive traffic on 0.0.0.0. Go's IsLoopback (source) strictly follows the definition of loopback IPs beginning with 127. 0.0.0.0 is not blocked.
Other sources
imgproxy is server for resizing, processing, and converting images. Imgproxy does not block the 0.0.0.0 address, even with IMGPROXYALLOWLOOPBACKSOURCEADDRESSES set to false. This can expose services on the local host. This vulnerability is fixed in 3.27.2.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What configurations are affected by CVE-2025-24354?
CVE-2025-24354 bypasses the IMGPROXY_ALLOW_LOOPBACK_SOURCE_ADDRESSES setting, impacting security configurations.