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CVE-2023-31145— Reflected XSS vulnerability in CollaboraOnline

Quick assessment

Affected
CollaboraOnline online
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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 22.05.13、21.11.9 和 6.4.27版本存在跨站脚本漏洞，该漏洞源于在使用推荐的捆绑包 Nextcloud 安装时可以完全绕过 CSP，攻击者利用该漏洞可以窃取敏感数据或执行未经授权的操作。

CVSS 4.3 · Medium EPSS 0.40% · P32
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I. Basic Information for CVE-2023-31145

Vulnerability Information
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Vulnerability Title
Reflected XSS vulnerability in CollaboraOnline
Source: CVE Program / CVE List V5
Vulnerability Description
Collabora Online is a collaborative online office suite based on LibreOffice technology. This vulnerability report describes a reflected XSS vulnerability with full CSP bypass in Nextcloud installations using the recommended bundle. The vulnerability can be exploited to perform a trivial account takeover attack. The vulnerability allows attackers to inject malicious code into web pages, which can be executed in the context of the victim's browser session. This means that an attacker can steal sensitive data, such as login credentials or personal information, or perform unauthorized actions on behalf of the victim, such as modifying or deleting data. In this specific case, the vulnerability allows for a trivial account takeover attack. An attacker can exploit the vulnerability to inject code into the victim's browser session, allowing the attacker to take over the victim's account without their knowledge or consent. This can lead to unauthorized access to sensitive information and data, as well as the ability to perform actions on behalf of the victim. Furthermore, the fact that the vulnerability bypasses the Content Security Policy (CSP) makes it more dangerous, as CSP is an important security mechanism used to prevent cross-site scripting attacks. By bypassing CSP, attackers can circumvent the security measures put in place by the web application and execute their malicious code. This issue has been patched in versions 22.05.13, 21.11.9, and 6.4.27. 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:U/C:N/I:L/A:N
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 22.05.13、21.11.9 和 6.4.27版本存在跨站脚本漏洞，该漏洞源于在使用推荐的捆绑包 Nextcloud 安装时可以完全绕过 CSP，攻击者利用该漏洞可以窃取敏感数据或执行未经授权的操作。
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 < 6.4.27 -

II. Public POCs for CVE-2023-31145

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III. Intelligence Information for CVE-2023-31145

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Vendor Advisories for CVE-2023-31145 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2023-31145

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