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Vulnerability record · CVE-2023-34939 · published 22 June 2023

CVE-2023-34939: Onlyoffice path traversal vulnerability

Onlyoffice · Onlyoffice

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

9.8 CVSS 3.1 Critical EPSS 5.0% · top 8.0% CWE-22 · Path traversal
9.8CVSS 3.1 base score
5.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ONLYOFFICE/CommunityServer/blob/master/CHANGELOG.md#version-1252 Release Notes
https://github.com/firsov/onlyoffice Exploit
https://github.com/firsov/onlyoffice/blob/main/CVE-2023-34939-PoC.md ExploitThird Party Advisory
https://github.com/ONLYOFFICE/CommunityServer/blob/master/CHANGELOG.md#version-1252 Release Notes
https://github.com/firsov/onlyoffice Exploit
https://github.com/firsov/onlyoffice/blob/main/CVE-2023-34939-PoC.md ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-34939), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.