# wger: trainer_login accepts GET - CSRF bypass enables forced session rebinding

Advisory record · `GHSA-xf64-4pmc-h8qf`

- **Identifiers:** `GHSA-xf64-4pmc-h8qf` · `CVE-2026-45161` · `PYSEC-2026-4317`
- **State:** Confirmed
- **Severity:** CVSS 5.4 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-352](https://cwe.mitre.org/data/definitions/352.html)
- **Tags:** [Cross-site request forgery (CSRF)](https://agentprime.io/advisories/tag/csrf.md)
- **Published:** 7 Oct 2026
- **Updated:** 15 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 7 Oct 2026, 13:45 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `wger` (PyPI): affected `<=2.1`; no fixed version yet

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Wger versions up to and including 2.1 are affected. The trainer_login view accepts GET requests and does not enforce CSRF protection on them, so an attacker can place an image tag on a malicious page that, when loaded by an authenticated trainer, switches that trainer's session to another user account in the gym without their knowledge. No fixed version is listed; the source gives no workaround beyond the proposed patch.

Written 1 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 5.4 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0009, the 1st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:08 UTC: First seen by agentprime
- 31 Oct 2026, 14:08 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-xf64-4pmc-h8qf)

## Sources

- [GitHub Advisory Database: GHSA-xf64-4pmc-h8qf](https://github.com/advisories/GHSA-xf64-4pmc-h8qf)
- [OSV: GHSA-xf64-4pmc-h8qf](https://osv.dev/vulnerability/GHSA-xf64-4pmc-h8qf)
- <https://github.com/wger-project/wger/security/advisories/GHSA-xf64-4pmc-h8qf>
- <https://github.com/wger-project/wger>
- <https://github.com/wger-project/wger/releases/tag/2.6>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-xf64-4pmc-h8qf>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-xf64-4pmc-h8qf/>. Everything for agents: <https://agentprime.io/llms.txt>.