CVE-2021-3199 in onlyoffice document server
LogPulse has a published detection rule for this CVE: it raises a notable when someone tries to exploit it.
What the vulnerability is
Directory traversal with remote code execution can occur in /upload in ONLYOFFICE Document Server before 5.6.3, when JWT is used, via a /.. sequence in an image upload parameter.
Affected software: onlyoffice document server
Scores
- CVSS: 9.8 (critical)
- EPSS: 30.24% chance of exploitation in the next 30 days
- CISA KEV: Known exploited, listed 2026-10-08
- Published: 2021-01-26
What LogPulse has for it
- Detection rule: Yes, published
- Agent check (vulnerable version): No
- Mitigation: No
Source data: NIST NVD, CISA KEV and FIRST EPSS. LogPulse processes new CVEs every hour.
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