What’s Vulnerable › Vulnerabilities

CVE-2023-49782: Cross-Site-Scripting vulnerability in error message passing in richdocumentscode

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% 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-79

Description

Collabora Online is a collaborative online office suite based on LibreOffice technology. Users of Nextcloud with `Collabora Online - Built-in CODE Server` app can be vulnerable to attack via proxy.php. The bug was fixed in Collabora Online - Built-in CODE Server (richdocumentscode) release 23.5.601. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

• Collaboraoffice Richdocumentscode: before 23.5.601 — fixed in 23.5.601

How to fix

Upgrade to a fixed version: Collaboraoffice Richdocumentscode 23.5.601. Check the vendor advisory for mitigations.

References

• https://apps.nextcloud.com/apps/richdocumentscode
• https://github.com/CollaboraOnline/online/security/advisories/GHSA-8xm5-pgfr-8mjr
• https://apps.nextcloud.com/apps/richdocumentscode
• https://github.com/CollaboraOnline/online/security/advisories/GHSA-8xm5-pgfr-8mjr

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