Hazard

Is CVE-2015-4852 being exploited?

Weaponised and widely attempted

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

Oracle WebLogic Server Deserialization of Untrusted Data Vulnerability

Oracle · WebLogic Server

CVSS 9.8 EPSS 96% 3 public exploits Fix deadline passed 3 May 2022

What it is

Oracle WebLogic Server contains a deserialization of untrusted data vulnerability within Apache Commons, which can allow for for remote code execution.

Why we say that

  • EPSS puts exploitation in the next 30 days at 96%
  • 3 public exploits published
  • 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.

Public exploit code

Indexed from Exploit-DB. Presence of code raises urgency; absence does not mean safety.

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 →