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Advisories

Serendipity before 2.6.0 SSRF via hex IPv4 and IPv6 addresses

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severity
high
date
Affecting

  • Serendipity >= 0, < 2.6.0

CWE
  • CWE-918 Server-Side Request Forgery (SSRF)
CVSS
8.4
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
Credit
riodrwn
Description
Serendipity before 2.6.0 contains a server-side request forgery vulnerability in the serendipity_url_allowed() filter that fails to block hex-encoded IPv4 addresses, IPv6 literals, and link-local ranges. Authenticated users with adminImagesAdd permission can bypass the filter using alternate address formats to request internal services and retrieve response bodies through the public uploads directory.

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