#VU72077 Improper access control in Office - CVE-2023-25150

Vulnerability identifier: #VU72077

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-25150

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Office
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Nextcloud

Description

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to improper access restrictions when accessing files. A remote user can trick Collabora into reusing a valid access token to obtain files that belong to other application users.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Office: 3.0.1 - 3.0.6, 3.1.0 - 3.1.1, 3.2.0 - 3.2.4, 3.3.0 - 3.3.15, 3.4.0 - 3.4.6, 3.5.0 - 3.5.3, 3.6.0, 3.7.0 - 3.7.19, 3.8.1 - 3.8.6, 4.0.0 - 4.0.4, 4.1.0 - 4.1.2, 4.2.0 - 4.2.8, 5.0.0 - 5.0.9, 6.0.0, 6.1.0 - 6.1.1, 6.2.0 - 6.2.1, 6.3.0 - 6.3.1, 7.0.0 - 7.0.1

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External links
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-64xc-r58v-53gj
https://hackerone.com/reports/1788222
https://github.com/nextcloud/richdocuments/pull/2669

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.