Vulnerability Intelligence Report
CVE-2021-25831
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.
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
EPSS Probability:11.50%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
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Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| onlyoffice | document_server | all |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
11.503%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | MITRE Corporation · N/A · USA |
| Reserved | 2021-01-22T00:00:00 |
| Published | 2021-03-01T15:08:37 |
| Last Updated | 2024-08-03T20:11:28 |
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