CVE-2021-25833 is a critical file extension handling vulnerability affecting ONLYOFFICE DocumentServer versions 4.2.0.71 through 5.6.0.21. An unauthenticated remote attacker can exploit this flaw by manipulating request data to overwrite arbitrary files, ultimately leading to remote code execution. This vulnerability carries a CVSS score of 9.8 (Critical) due to its network-based attack vector, low complexity, and complete compromise of confidentiality, integrity, and availability. Despite its severity, there is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.2.0.71, <= 5.6.0.21CPE matchmatch criteria | cpe:2.3:a:onlyoffice:document_server:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.