How severe is CVE-2023-48308?

CVE-2023-48308 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 none, and availability low.

Is CVE-2023-48308 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-48308?

CVE-2023-48308 affects Nextcloud Calendar. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-48308?

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

When was CVE-2023-48308 published?

CVE-2023-48308 was published on 2023-12-22 and last updated on 2026-06-17.

CVE-2023-48308

CVE-2023-48308 is a low-severity vulnerability in Nextcloud Calendar 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-212.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-212
Affected product: Nextcloud Calendar
Published: 2023-12-22
Last modified: 2026-06-17

Description

Nextcloud/Cloud is a calendar app for Nextcloud. An attacker can gain access to stacktrace and internal paths of the server when generating an exception while editing a calendar appointment. It is recommended that the Nextcloud Calendar app is upgraded to 4.5.3

Frequently asked questions

What is CVE-2023-48308?: Nextcloud/Cloud is a calendar app for Nextcloud. An attacker can gain access to stacktrace and internal paths of the server when generating an exception while editing a calendar appointment. It is recommended that the Nextcloud Calendar app is upgraded to 4.5.3
How severe is CVE-2023-48308?: CVE-2023-48308 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 none, and availability low.
Is CVE-2023-48308 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-48308?: CVE-2023-48308 affects Nextcloud Calendar. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-48308?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-48308 published?: CVE-2023-48308 was published on 2023-12-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nextcloud:calendar:*:*:*:*:*:*:*:*

More vulnerabilities in Nextcloud Calendar

CVE-2025-66550 — Medium (CVSS 5.7): Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.17 and 5.2.4, when a malicious user creates a calendar…
CVE-2022-24838 — Medium (CVSS 5.3): Nextcloud Calendar is a calendar application for the nextcloud framework. SMTP Command Injection in Appointment Emails…
CVE-2025-66511 — Medium (CVSS 4.8): Nextcloud Calendar is a calendar app for Nextcloud. Prior to 6.0.3, the Calendar app generates participant tokens for…
CVE-2018-3763 — Medium (CVSS 4.8): In Nextcloud Calendar before 1.5.8 and 1.6.1, a missing sanitization of search results for an autocomplete field could…
CVE-2024-37316 — Medium (CVSS 4.6): Nextcloud Calendar is a calendar app for Nextcloud. Authenticated users could create an event with manipulated…
CVE-2026-45286 — Medium (CVSS 4.3): Nextcloud is an open source content collaboration platform. From versions 5.5.13 to before 5.5.17, and 6.2.0 to before…

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