by Kastro
Paper/Archive/CVE-2021-25833

CVE-2021-25833

mitre — A file extension handling issue was found in [server] module of ONLYOFFICE DocumentServer v4.2.0.71-v5.6.0.21.

EPSS 44%CVSS 9.8
critical.is priorityof 100
49
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 98.7.987 × 2019.7No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

A file extension handling issue was found in [server] module of ONLYOFFICE DocumentServer v4.2.0.71-v5.6.0.21. The file extension is controlled by an attacker through the request data and leads to arbitrary file overwriting. Using this vulnerability, a remote attacker can obtain remote code execution on DocumentServer.

Affected

ProductAffectedFixed inSource
n/an/a–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refgithub.com/ONLYOFFICE/DocumentServerrefgithub.com/ONLYOFFICE/serverrefgithub.com/ONLYOFFICE/server/blob/v5.6.0.21/DocService/sources/converterservice.js#L200refgithub.com/ONLYOFFICE/server/blob/v5.6.0.21/FileConverter/sources/converter.js#L593refgithub.com/ONLYOFFICE/server/blob/v5.6.0.21/FileConverter/sources/converter.js#L283refgithub.com/merrychap/poc_exploits/tree/master/ONLYOFFICE/CVE-2021-25833