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Improper Restriction of XML External Entity Reference

CVE-2021-39371

High
7.5/10

Summary

An XML external entity (XXE) injection in PyWPS through 4.4.4 allows an attacker to view files on the application server filesystem by assigning a path to the entity. OWSLib through 0.32.0 may also be affected.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • NONE

CWE-611 - Improper Restriction of XML External Entity Reference

Listed 4th in the 'OWASP Top Ten', XML External Entities (XXE) vulnerability allows attackers to provide an XML input that contains an external entity. When the XML is parsed, it can cause data extraction and manipulation, execution of commands, denial-of-service attacks, and server-side request forgery.

References

Advisory Timeline

  • Published