← Vulnerability feed

Vulnerability record · CVE-2025-30345 · published 21 March 2025

CVE-2025-30345: Openslides cross-site scripting vulnerability

Openslides · Openslides

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.

4.1 CVSS 3.1 Medium EPSS 0.28% · top 81.4% CWE-116 · CWE-116CWE-79 · Cross-site scripting
4.1CVSS 3.1 base score
0.28%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.x41-dsec.de/lab/advisories/x41-2025-001-OpenSlides ExploitThird Party Advisory

Track CVE-2025-30345 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-25519Openslides improper access control vulnerabilityOpenSlides is a free, web based presentation and assembly system for managing and projecting agenda, motions and elections of an assembly. Prior to v…EPSS 0.68%8.9CVE-2020-26280Openslides cross-site scripting vulnerabilityOpenSlides is a free, Web-based presentation and assembly system for managing and projecting agenda, motions, and elections of assemblies. OpenSlides…EPSS 1.4%7.5CVE-2024-22892Openslides inadequate encryption strength vulnerabilityOpenSlides 4.0.15 was discovered to be using a weak hashing algorithm to store passwords.EPSS 0.25%7.5CVE-2024-22893Openslides improper privilege management vulnerabilityOpenSlides 4.0.15 verifies passwords by comparing password hashes using a function with content-dependent runtime. This can allow attackers to obtain…EPSS 0.36%6.5CVE-2025-30343Openslides path traversal vulnerabilityA directory traversal issue was discovered in OpenSlides before 4.2.5. Files can be uploaded to OpenSlides meetings and organized in folders. The int…EPSS 0.47%6.1CVE-2025-30342Openslides cross-site scripting vulnerabilityAn XSS issue was discovered in OpenSlides before 4.2.5. When submitting descriptions such as Moderator Notes or Agenda Topics, an editor is shown tha…EPSS 0.26%3.7CVE-2025-30344Openslides observable discrepancy vulnerabilityAn issue was discovered in OpenSlides before 4.2.5. During login at the /system/auth/login/ endpoint, the system's response times differ depending on…EPSS 0.32%7.8CVE-2026-20245Cisco Catalyst SD-WAN CLI command injection via crafted file uploadCisco Catalyst SD-WAN Controller, Manager and Validator fail to properly validate user-supplied input in the CLI, allowing an authenticated local att…KEVEPSS 25%analysed

Source: NIST National Vulnerability Database (record CVE-2025-30345), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.