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    CVE-2026-86256

    wger before 2.6 (affected versions <= 2.5.0) contains an open redirect vulnerability in the trainer_login view (wger/core/views/user.py). After a trainer enters impersonation mode, the view redirects to the user-supplied 'next' GET parameter via HttpResponseRedirect() without validating it with url_has_allowed_host_and_scheme(). An attacker who delivers a crafted link to an authenticated trainer can redirect the trainer's browser to an attacker-controlled domain, enabling phishing and leaking the wger URL structure (including the impersonated user's user_pk) via the Referer header.

    Published:Sep 6, 2026
    Last Modified:Sep 9, 2026
    EPS:Sep 6, 2026
    EPSS Score:0.0018
    CVSS Score:5.4

    Affected Products

    Vendor
    Wger
    Product
    Wger

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-178 Cross-Site Flashing

    Related CVEs

    CVE-2026-86257 (CVSS 4.8) — wger before 2.6 fails to sanitize first_name and last_name fields in the gym member TSV export endpoint, allow…
    CVE-2026-86255 (CVSS 7.1) — wger before 2.5 fails to validate the maximum duration of routine date ranges, allowing authenticated users to…
    CVE-2026-86254 (CVSS 6.1) — wger versions through master contain an incomplete authorization bypass in wger/core/views/user.py where three…
    CVE-2026-40474 (CVSS 7.6) — wger is a free, open-source workout and fitness manager. In versions 2.5 and below, the GymConfigUpdateView de…
    CVE-2026-40353 (CVSS 5.1) — wger is a free, open-source workout and fitness manager. In versions 2.5 and below, the attribution_link prope…
    CVE-2026-27839 (CVSS 4.3) — wger is a free, open-source workout and fitness manager. In versions up to and including 2.4, three `nutrition…
    CVE-2026-27838 (CVSS 3.1) — wger is a free, open-source workout and fitness manager. Five routine detail action endpoints check a cache be…
    CVE-2026-27835 (CVSS 4.3) — wger is a free, open-source workout and fitness manager. In versions up to and including 2.4, `RepetitionsConf…
    CVE-2022-2650 (CVSS 9.8) — Improper Restriction of Excessive Authentication Attempts in GitHub repository wger-project/wger prior to 2.2.…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High