CVE-2023-34939

moderate-risk
Published 2023-06-22

Onlyoffice Community Server before v12.5.2 was discovered to contain a remote code execution (RCE) vulnerability via the component UploadProgress.ashx.

Do I need to act?

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12.8% chance of exploitation in next 30 days
EPSS score — higher than 87% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Onlyoffice

References (6)

Release Notes https://github.com/ONLYOFFICE/CommunityServer/blob/master/CHANGELOG.md#version-1...
Exploit https://github.com/firsov/onlyoffice
Exploit https://github.com/firsov/onlyoffice/blob/main/CVE-2023-34939-PoC.md
Release Notes https://github.com/ONLYOFFICE/CommunityServer/blob/master/CHANGELOG.md#version-1...
Exploit https://github.com/firsov/onlyoffice
Exploit https://github.com/firsov/onlyoffice/blob/main/CVE-2023-34939-PoC.md
49
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 12/34 · Low
Exposure 5/34 · Minimal