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

Quick assessment

Affected
CollaboraOnline online
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Collabora Online是英国Collabora公司的一个应用软件。一个强大的基于 LibreOffice 的在线办公室，支持所有主要的文档、电子表格和演示文件格式。 Collabora Online 23.5.601之前版本存在跨站脚本漏洞，该漏洞源于容易受到 proxy.php 的攻击。

CVSS 7.1 · High EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-49782

Vulnerability Information
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Vulnerability Title
Cross-Site-Scripting vulnerability in error message passing in richdocumentscode
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Collabora Online 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Collabora Online是英国Collabora公司的一个应用软件。一个强大的基于 LibreOffice 的在线办公室，支持所有主要的文档、电子表格和演示文件格式。 Collabora Online 23.5.601之前版本存在跨站脚本漏洞，该漏洞源于容易受到 proxy.php 的攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
CollaboraOnline online < 23.5.601 -

II. Public POCs for CVE-2023-49782

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8615 chars
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III. Intelligence Information for CVE-2023-49782

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Vendor Advisories for CVE-2023-49782 (1)

Other References for CVE-2023-49782 (1)

IV. Related Vulnerabilities

Same product: online
Same vendor: CollaboraOnline
Same weakness: CWE-79

V. Comments for CVE-2023-49782

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