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CVE-2025-30345

Quick assessment

Affected
Intevation OpenSlides
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.

OpenSlides是OpenSlides开源的一个免费的、基于网络的演示和集会系统。用于管理和投影集会的议程、动议和选举。 OpenSlides 4.2.5之前版本存在安全漏洞，该漏洞源于创建新聊天时未正确过滤HTML元素，可能导致网站布局被干扰。

CVSS 3.5 · Low EPSS 0.28% · P19

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2025-30345

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in OpenSlides before 4.2.5. When creating new chats via the chat_group.create action, the user is able to specify the name of the chat. Some HTML elements such as SCRIPT are filtered, whereas others are not. In most cases, HTML entities are encoded properly, but not when deleting chats or deleting messages in these chats. This potentially allows attackers to interfere with the layout of the rendered website, but it is unlikely that victims would click on deleted chats or deleted messages.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对输出编码和转义不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
OpenSlides 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenSlides是OpenSlides开源的一个免费的、基于网络的演示和集会系统。用于管理和投影集会的议程、动议和选举。 OpenSlides 4.2.5之前版本存在安全漏洞，该漏洞源于创建新聊天时未正确过滤HTML元素，可能导致网站布局被干扰。
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
Intevation OpenSlides 0 ~ 4.2.5 -

II. Public POCs for CVE-2025-30345

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III. Intelligence Information for CVE-2025-30345

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Vendor Advisories for CVE-2025-30345 (1)

Same Patch Batch · Intevation · 2025-03-21 · 4 CVEs total

CVE-2025-30342 5.4 MEDIUM OpenSlides 安全漏洞
CVE-2025-30344 5.3 MEDIUM OpenSlides 安全漏洞
CVE-2025-30343 3.0 LOW OpenSlides 安全漏洞

IV. Related Vulnerabilities

Same product: OpenSlides
Same vendor: Intevation
Same weakness: CWE-116

V. Comments for CVE-2025-30345

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