CVE-2021-43448
MEDIUM
5.3
CVSS Score
Published: January 23, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 04:10 AM UTC
1 product affected across 1 vendorServer
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Severity
MEDIUM5.3
Exploit prediction
EPSS 1%
SSVC
PoC
Description
ONLYOFFICE all versions as of 2021-11-08 is vulnerable to Improper Input Validation. A lack of input validation can allow an attacker to spoof the names of users who interact with a document, if the document id is known.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v ≤ 7.0.0.49
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (3)
ExploitMitigationThird Party Advisory
Source: [email protected]
https://labs.nettitude.com/blog/exploiting-onlyoffice-web-sockets-for-unauthenticated-remote-code-execution/SSVC — Action Prioritization
SSVCPoCNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
5.3MEDIUMCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- HIGH
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-20
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