VULNERABILITY INTELLIGENCE

CVE-2020-15098

CVSS score8.8 HIGH
EPSS probability2.23%
CISA KEVNot currently listed
Published2020-07-29
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.20, and greater than or equal to 10.0.0 and less than 10.4.6, it has been discovered that an internal verification mechanism can be used to generate arbitrary checksums. This allows to inject arbitrary data having a valid cryptographic message authentication code (HMAC-SHA1) and can lead to various attack chains including potential privilege escalation, insecure deserialization & remote code execution. The overall severity of this vulnerability is high based on mentioned attack chains and the requirement of having a valid backend user session (authenticated). This has been patched in versions 9.5.20 and 10.4.6.

Weakness classification

  • CWE-20: Improper Input Validation
  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-325: Missing Cryptographic Step
  • CWE-327: Use of a Broken or Risky Cryptographic Algorithm
  • CWE-502: Deserialization of Untrusted Data

Primary references