How severe is CVE-2025-30345?

CVE-2025-30345 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2025-30345 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-30345?

CVE-2025-30345 affects Openslides. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-30345?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-30345 have an EU (EUVD) identifier?

Yes. CVE-2025-30345 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7266.

When was CVE-2025-30345 published?

CVE-2025-30345 was published on 2025-03-21 and last updated on 2026-06-17.

CVE-2025-30345

CVE-2025-30345 is a low-severity vulnerability in Openslides with a CVSS 3.x base score of 3.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-7266
Weakness: CWE-79
Affected product: Openslides
Published: 2025-03-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-30345?: 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.
How severe is CVE-2025-30345?: CVE-2025-30345 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2025-30345 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-30345?: CVE-2025-30345 affects Openslides. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-30345?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-30345 have an EU (EUVD) identifier?: Yes. CVE-2025-30345 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7266.
When was CVE-2025-30345 published?: CVE-2025-30345 was published on 2025-03-21 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:openslides:openslides:*:*:*:*:*:*:*:*

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