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Vulnerability of TYPO3 typo3_forum: privilege escalation via Broken Access Control

Synthesis of the vulnerability 

An attacker can bypass restrictions via Broken Access Control of TYPO3 typo3_forum, in order to escalate his privileges.
Impacted software: TYPO3 Extensions ~ not comprehensive.
Severity of this computer vulnerability: 2/4.
Creation date: 07/07/2020.
Références of this announce: CVE-2020-15513, TYPO3-EXT-SA-2020-010, VIGILANCE-VUL-32734.

Description of the vulnerability 

An attacker can bypass restrictions via Broken Access Control of TYPO3 typo3_forum, in order to escalate his privileges.
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This threat alert impacts software or systems such as TYPO3 Extensions ~ not comprehensive.

Our Vigil@nce team determined that the severity of this computer vulnerability bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this weakness note.

Solutions for this threat 

TYPO3 typo3_forum: version 1.2.1.
The version 1.2.1 is fixed:
  https://extensions.typo3.org/extension/download/typo3_forum/1.2.1/zip
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