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Advisory record · GHSA-j77q-2qqg-6989

Apache Struts vulnerable to remote arbitrary command execution due to improper input validation

CVSS 10.0 CriticalCriticalIn CISA KEV · ransomwareEPSS 1.00 · 99th percentile

Critical, because:

  • In CISA’s KEV catalogue since 3 Nov 2021: it is known to be exploited.
  • CVSS score 10.0: 9.0 or more.
  • CVSS score 10.0 (7.0 or more) and EPSS 1.00 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the GitHub Advisory Database at 18 Oct 2018, 19:24 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.apache.struts:struts2-coreMaven>=2.3.0, <2.3.32 || >=2.5.0, <2.5.10.12.3.32, 2.5.10.1
Identifiers
GHSA-j77q-2qqg-6989 · CVE-2017-5638
Weakness (CWE)
CWE-20 · CWE-755
Tags
Published
18 Oct 2018
Updated
22 Oct 2025

Machine-written summary

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

Apache Struts2 core versions from 2.3.0 before 2.3.32 and from 2.5.0 before 2.5.10.1 are vulnerable. A remote attacker can send a crafted Content-Type, Content-Disposition, or Content-Length HTTP header during a file upload using the Jakarta Multipart parser and execute arbitrary commands on the server. Upgrade struts2-core to 2.3.32, 2.5.10.1, or a later release.

Written 7 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

ScoreRatingCVSSVectorSource
10.0 Critical 3.0 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H GitHub Advisory Database
  • CISA KEV Listed since 3 Nov 2021: known to be exploited. CISA reports use in ransomware campaigns.
  • EPSS 1.00, the 99th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:10 UTC First seen by agentprime
  2. 31 Oct 2026, 15:10 UTC Confirmed by OSV

Sources

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.