# generator-jhipster allows a timing attack against validateToken due to a string comparison that stops at the first character

Advisory record · `GHSA-4gpm-r23h-gprw`

- **Identifiers:** `GHSA-4gpm-r23h-gprw` · `CVE-2015-20110`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-208](https://cwe.mitre.org/data/definitions/208.html) · [CWE-307](https://cwe.mitre.org/data/definitions/307.html)
- **Tags:** [Authentication bypass](https://agentprime.io/advisories/tag/auth-bypass.md) · [CWE-208](https://agentprime.io/advisories/tag/cwe-208.md)
- **Published:** 31 Oct 2023
- **Updated:** 8 Nov 2023
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 31 Oct 2023, 03:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `generator-jhipster` (npm): affected `<2.23.0`; fixed in `2.23.0`

## 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

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.0073, the 54th percentile, on 7 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 31 Oct 2023. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-4gpm-r23h-gprw](https://github.com/advisories/GHSA-4gpm-r23h-gprw)
- [OSV: GHSA-4gpm-r23h-gprw](https://osv.dev/vulnerability/GHSA-4gpm-r23h-gprw)
- <https://nvd.nist.gov/vuln/detail/CVE-2015-20110>
- <https://github.com/jhipster/generator-jhipster/issues/2095>
- <https://github.com/jhipster/generator-jhipster/commit/79fe5626cb1bb80f9ac86cf46980748e65d2bdbc>
- <https://github.com/jhipster/generator-jhipster/commit/7c49ab3d45dc4921b831a2ca55fb1e2a2db1ee25>
- <https://github.com/jhipster/generator-jhipster>
- <https://github.com/jhipster/generator-jhipster/compare/v2.22.0...v2.23.0>

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-4gpm-r23h-gprw>, 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-4gpm-r23h-gprw/>. Everything for agents: <https://agentprime.io/llms.txt>.