# LimeSurvey constructs account password-reset links from the client-supplied HTTP Host header without validating it.

Advisory record · `GHSA-5c37-5j7w-8mh8`

- **Identifiers:** `GHSA-5c37-5j7w-8mh8` · `CVE-2026-50635` · `PKSA-bgzx-wwbd-v2zr`
- **State:** Confirmed
- **Severity:** CVSS 8.7 High
- **Critical:** No
- **Weakness (CWE):** [CWE-640](https://cwe.mitre.org/data/definitions/640.html)
- **Tags:** [CWE-640](https://agentprime.io/advisories/tag/cwe-640.md)
- **Published:** 9 Jun 2026
- **Updated:** 31 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 9 Jun 2026, 18:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `limesurvey/limesurvey` (Packagist): affected `<=7.0.0-beta1`; no fixed version yet

## 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

- 8.7 High, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`, from CNA (VulnCheck)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0037, the 31st percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 9 Jun 2026. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-5c37-5j7w-8mh8](https://github.com/advisories/GHSA-5c37-5j7w-8mh8)
- [OSV: GHSA-5c37-5j7w-8mh8](https://osv.dev/vulnerability/GHSA-5c37-5j7w-8mh8)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-50635>
- <https://github.com/LimeSurvey/LimeSurvey/pull/5032>
- <https://github.com/LimeSurvey/LimeSurvey/commit/ac2a4f1673de7b56e7a342c338f36e8bb077d4b3>
- <https://github.com/LimeSurvey/LimeSurvey/commit/b394cb64328aa6db95e3304f82c8c9e603e9ceb0>
- <https://github.com/LimeSurvey/LimeSurvey>
- <https://www.limesurvey.org/>
- <https://www.vulncheck.com/advisories/limesurvey-password-reset-host-header-injection-discloses-reset-token>

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-5c37-5j7w-8mh8>, 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-5c37-5j7w-8mh8/>. Everything for agents: <https://agentprime.io/llms.txt>.