Unescaped passing of the request URL in Collabora Online
Priority LOW 31CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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. This vulnerability has been fixed in Collabora Online - Built-in CODE Server (richdocumentscode) release 23.5.403. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00406 35th percentileScored 2026-11-07
Fix Fixed online (CollaboraOnline): 23.5.403
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Collabora | online | before 23.5.403 | 23.5.403 | Patch available | CNA |
- online VendorCollabora Affected before 23.5.403 Fixed in 23.5.403 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:collaboraoffice:collabora_online:*:*:*:*:*:*:*:* | before 23.5.403 | Vulnerable | Collaboraoffice |
- cpe:2.3:a:collaboraoffice:collabora_online:*:*:*:*:*:*:*:* Versions before 23.5.403 Vulnerable ·Collaboraoffice
Remediation
- Fix · CNA online (CollaboraOnline) Fixed in 23.5.403
Timeline
- 2026-10-02 Threatist record created from CVE-2023-48314
References
More Collabora vulnerabilities
- TI-2026-73868 Collabora Online Built-in CODE Server allows remote code execution KEVCVSS 4.0CRITICAL 9.2
- TI-2026-19024 Collabora Online vulnerable to Authorization Bypass CVSS 3.1MEDIUM 5.3
- TI-2021-12412 Unauthenticated attacker could gain access to currently open files CVSS 3.1CRITICAL 9.8
- TI-2025-40711 Configuration-Dependent RCE (OS Command Injection) in richdocumentscode proxy CVSS 4.0HIGH 7.2
- TI-2023-16934 Collabora Online has Stored Cross-Site-Scripting vulnerability in admin interface CVSS 3.1HIGH 8.7
- TI-2025-20570 Collabora Online Vulnerable to Arbitrary File Write CVSS 4.0HIGH 8.3
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences