CVE-2023-33182: Nextcloud Contacts photos only sanitized if mime type is all lower case
Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. The unsanitized SVG is converted to a JavaScript blob (in memory data) that the Avatar can't render. Due to this constellation the missing sanitization does not seem to be exploitable. It is recommended that the Contacts app is upgraded to 5.0.3 or 4.2.4
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Nextcloud Contacts appto a version that resolves this vulnerability.Fixed in 5.0.3 - Upgrade
Upgrade
Nextcloud Contacts appto a version that resolves this vulnerability.Fixed in 4.2.4
Event History
Frequently Asked Questions
What is CVE-2023-33182?
CVE-2023-33182 is a vulnerability in the Contacts app for Nextcloud that allows the execution of JavaScript blob due to unsanitized SVG.
What is the severity of CVE-2023-33182?
The severity of CVE-2023-33182 is medium with a CVSS score of 4.3.
How does CVE-2023-33182 affect Nextcloud Contacts?
CVE-2023-33182 affects Nextcloud Contacts versions 4.1.0 to 4.2.4 and 5.0.0 to 5.0.3.
How can I fix CVE-2023-33182?
To fix CVE-2023-33182, it is recommended to update the Nextcloud Contacts app to the latest version.
Are there any references for CVE-2023-33182?
Yes, you can find more information about CVE-2023-33182 in the following references: [Link 1](https://github.com/nextcloud/contacts/pull/3199), [Link 2](https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hxr6-cx85-gcjx), [Link 3](https://hackerone.com/reports/1789602).