CVE-2021-25830

A file extension handling issue was found in [core] module of ONLYOFFICE DocumentServer v4.2.0.236-v5.6.4.13. An attacker must request the conversion of the crafted file from DOCT into DOCX format. Using the chain of two other bugs related to improper string handling, an attacker can achieve remote code execution on DocumentServer.

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

11.76% chance of exploitation in the next 30 days, 96th percentile

Published

2021-03-01

Updated

2024-08-03

Proof-of-concept exploits (1)

• merrychap/poc_exploits/tree/master/ONLYOFFICE/CVE-2021-25830

References

• CVE Record
• NVD entry

Related

• CVE-2020-13898
• CVE-2020-13899
• CVE-2020-13900
• CVE-2020-13901
• CVE-2021-25829
• CVE-2021-25831