CVE-2023-49788: Improper handling of browser-side provided input in richdocuments path handling

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-08 · updated 2026-06-17
Weakness: CWE-22

Description

Collabora Online is a collaborative online office suite based on LibreOffice technology. Unlike a standalone dedicated Collabora Online server, the Built-in CODE Server (richdocumentscode) is run without chroot sandboxing. Vulnerable versions of the richdocumentscode app can be susceptible to attack via modified client->server commands to overwrite files outside the sub directory the server has provided for the transient session. Files which can be accessed are limited to those that the server process has access to. The bug was fixed in Collabora Online - Built-in CODE Server (richdocumentscode) release 23.5.602. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

Collaboraoffice Richdocumentscode: before 23.5.602 — fixed in 23.5.602

How to fix

Upgrade to a fixed version: Collaboraoffice Richdocumentscode 23.5.602. Check the vendor advisory for mitigations.

References

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