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Maven
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MEDIUM severity

GHSA-84wg-rgp8-2hg4

MEDIUM

GHSA-84wg-rgp8-2hg4 is a medium-severity (CVSS 5.9) CWE-77 vulnerability in org.apache.james:james-server. O3 Security confirms whether GHSA-84wg-rgp8-2hg4 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Command Injection in Apache James

Also known asCVE-2021-38542
Published
Jan 8, 2022
Updated
Feb 4, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Feb 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
org.apache.james:james-server

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Apache James prior to release 3.6.1 is vulnerable to a buffering attack relying on the use of the STARTTLS command. This can result in Man-in -the-middle command injection attacks, leading potentially to leakage of sensible information.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
Mavenorg.apache.james:james-serverall versions3.6.1

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.james:james-server. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update org.apache.james:james-server to 3.6.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-84wg-rgp8-2hg4 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-84wg-rgp8-2hg4 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-84wg-rgp8-2hg4. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Apache James prior to release 3.6.1 is vulnerable to a buffering attack relying on the use of the STARTTLS command. This can result in Man-in -the-middle command injection attacks, leading potentially to leakage of sensible information.
O3 Security · Impact-Aware SCA

Is GHSA-84wg-rgp8-2hg4 in your dependencies?

O3 detects GHSA-84wg-rgp8-2hg4 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

GHSA-84wg-rgp8-2hg4: Command Injection… | O3 Security