How severe is CVE-2023-30540?

CVE-2023-30540 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 low, integrity none, and availability none.

Is CVE-2023-30540 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-30540?

CVE-2023-30540 affects Nextcloud Talk. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-30540?

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

When was CVE-2023-30540 published?

CVE-2023-30540 was published on 2023-04-17 and last updated on 2026-06-17.

CVE-2023-30540

CVE-2023-30540 is a low-severity vulnerability in Nextcloud Talk 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-200.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Nextcloud Talk
Published: 2023-04-17
Last modified: 2026-06-17

Description

Nextcloud Talk is a chat, video & audio call extension for Nextcloud. In affected versions a user that was added later to a conversation can use this information to get access to data that was deleted before they were added to the conversation. This issue has been patched in version 15.0.5 and it is recommended that users upgrad to 15.0.5. There are no known workarounds for this issue.

Frequently asked questions

What is CVE-2023-30540?: Nextcloud Talk is a chat, video & audio call extension for Nextcloud. In affected versions a user that was added later to a conversation can use this information to get access to data that was deleted before they were added to the conversation. This issue has been patched in version 15.0.5 and it is recommended that users upgrad to 15.0.5. There are no known workarounds for this issue.
How severe is CVE-2023-30540?: CVE-2023-30540 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 low, integrity none, and availability none.
Is CVE-2023-30540 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-30540?: CVE-2023-30540 affects Nextcloud Talk. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-30540?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-30540 published?: CVE-2023-30540 was published on 2023-04-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*

More vulnerabilities in Nextcloud Talk

CVE-2020-8180 — Critical (CVSS 9.9): A too lax check in Nextcloud Talk 6.0.4, 7.0.2 and 8.0.7 allowed a code injection when a not correctly sanitized talk…
CVE-2021-32689 — High (CVSS 8.1): Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a…
CVE-2023-39957 — High (CVSS 7.8): Nextcloud Talk Android allows users to place video and audio calls through Nextcloud on Android. Prior to version…
CVE-2021-32676 — Medium (CVSS 6.5): Nextcloud Talk is a fully on-premises audio/video and chat communication service. Password protected shared chats in…
CVE-2021-39222 — Medium (CVSS 6.4): Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Talk application was vulnerable to a…
CVE-2018-3781 — Medium (CVSS 5.4): A missing sanitization of search results for an autocomplete field in NextCloud Talk <3.2.5 could lead to a stored XSS…

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