Miniflux 2 is an open source feed reader. Prior to 2.3.1, IsRelativePath in internal/urllib/url.go accepts redirect targets containing backslashes because Go URL parsing treats them as path characters. Browser backslash normalization converts them to forward slashes. An unauthenticated attacker can provide such a redirect_url value to the login flow, bypass the relative-path and host checks, and redirect a victim to an attacker-controlled external site. This issue is fixed in version 2.3.1.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 1
- First seenCVSS 5.1NVD modified 2026-10-12 16:10
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 5
- https://github.com/miniflux/v2/commit/c896bafdaa19c3f280b02b1059f84706495f1949
- https://github.com/miniflux/v2/pull/4362
- https://github.com/miniflux/v2/releases/tag/2.3.1
- https://github.com/miniflux/v2/security/advisories/GHSA-m999-j542-5w3r
- https://github.com/miniflux/v2/security/advisories/GHSA-m999-j542-5w3r