Hazard

Is CVE-2020-17530 being exploited?

Weaponised and widely attempted

Reliable public exploit code exists, or mass exploitation attempts are probable. Patch inside days, not weeks.

Apache Struts Remote Code Execution Vulnerability

Apache · Struts

CVSS 9.8 EPSS 96% no public exploit indexed Fix deadline passed 3 May 2022

What it is

Forced Object-Graph Navigation Language (OGNL) evaluation in Apache Struts, when evaluated on raw user input in tag attributes, can lead to remote code execution.

Why we say that

  • EPSS puts exploitation in the next 30 days at 96%
  • CISA's federal remediation deadline (2022-05-03) has passed
  • CVSS 9.8 critical
  • Listed in the CISA Known Exploited Vulnerabilities catalogue

Every line above comes from a named public source. Where the evidence is thin, we say so rather than inventing confidence — see methodology.

What to do

Apply updates per vendor instructions.

What it costs when this goes wrong

This is where UK enforcement meets the vulnerability record. Where an unfixed vulnerability leads to a breach, the ICO treats it as a security failure under UK GDPR. Recent cases:

All UK cases caused by unpatched software →