# Nimbus JOSE+JWT vulnerable to padding oracle attack

Advisory record · `GHSA-jfmq-4g4m-99rh`

- **Identifiers:** `GHSA-jfmq-4g4m-99rh` · `CVE-2017-12973`
- **State:** Confirmed
- **Severity:** CVSS 3.1 Low
- **Critical:** No
- **Weakness (CWE):** [CWE-354](https://cwe.mitre.org/data/definitions/354.html)
- **Tags:** [CWE-354](https://agentprime.io/advisories/tag/cwe-354.md)
- **Published:** 13 May 2022
- **Updated:** 8 Nov 2023
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 13 May 2022, 01:42 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `com.nimbusds:nimbus-jose-jwt` (Maven): affected `<4.39`; fixed in `4.39`

## 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

- 3.1 Low, CVSS 3.0: `CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.0064, the 50th 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 13 May 2022. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-jfmq-4g4m-99rh](https://github.com/advisories/GHSA-jfmq-4g4m-99rh)
- [OSV: GHSA-jfmq-4g4m-99rh](https://osv.dev/vulnerability/GHSA-jfmq-4g4m-99rh)
- <https://nvd.nist.gov/vuln/detail/CVE-2017-12973>
- <https://bitbucket.org/connect2id/nimbus-jose-jwt/commits/6a29f10f723f406eb25555f55842c59a43a38912>
- <https://bitbucket.org/connect2id/nimbus-jose-jwt/issues/223/aescbc-return-immediately-on-invalid-hmac>
- <https://bitbucket.org/connect2id/nimbus-jose-jwt/src/master/CHANGELOG.txt>

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-jfmq-4g4m-99rh>, 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-jfmq-4g4m-99rh/>. Everything for agents: <https://agentprime.io/llms.txt>.