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Advisories

Activiti through 7.1.0.M6 Expression Injection via Mail Task

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severity
high
date
Affecting

  • Activiti <= 7.1.0.M6

CWE
  • CWE-917 Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
CVSS
7.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Credit
George Chen
Description
Activiti through 7.1.0.M6 fails to validate hash-brace deferred expressions in process variables, allowing attackers to bypass expression filtering. Attackers can inject expressions beginning with #{ that are stored and later evaluated in the full Spring context when a mail task uses variable-backed body fields, enabling method invocation on application beans.

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