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CVE-2025-30342

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，该漏洞源于在提交描述时允许插入各种HTML元素，可能导致跨站脚本攻击。

CVSS 5.4 · Medium EPSS 0.26% · P16
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I. Basic Information for CVE-2025-30342

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An XSS issue was discovered in OpenSlides before 4.2.5. When submitting descriptions such as Moderator Notes or Agenda Topics, an editor is shown that allows one to format the submitted text. This allows insertion of various HTML elements. When trying to insert a SCRIPT element, it is properly encoded when reflected; however, adding attributes to links is possible, which allows the injection of JavaScript via the onmouseover attribute and others. When a user moves the mouse over such a prepared link, JavaScript is executed in that user's session.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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
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，该漏洞源于在提交描述时允许插入各种HTML元素，可能导致跨站脚本攻击。
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
Intevation OpenSlides 0 ~ 4.2.5 -

II. Public POCs for CVE-2025-30342

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III. Intelligence Information for CVE-2025-30342

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Vendor Advisories for CVE-2025-30342 (1)

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

CVE-2025-30344 5.3 MEDIUM OpenSlides 安全漏洞
CVE-2025-30345 3.5 LOW 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-79

V. Comments for CVE-2025-30342

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