cve/2021/CVE-2021-25831.md

CVE-2021-25831

Description

A file extension handling issue was found in [core] module of ONLYOFFICE DocumentServer v4.0.0-9-v5.6.3. An attacker must request the conversion of the crafted file from PPTT into PPTX format. Using the chain of two other bugs related to improper string handling, a remote attacker can obtain remote code execution on DocumentServer.

POC

Reference

• https://github.com/merrychap/poc_exploits/tree/master/ONLYOFFICE/CVE-2021-25831

Github

• https://github.com/konatabrk/POC-onlyoffice
• https://github.com/merrychap/POC-onlyoffice