Nextcloud Server/Enterprise Server up to 25.0.13/26.0.8/27.1.3 HTML Code HTML injection

Summaryinfo

A vulnerability has been found in Nextcloud Server and Enterprise Server up to 25.0.13/26.0.8/27.1.3 and classified as problematic. The affected element is an unknown function of the component HTML Code Handler. Performing a manipulation results in HTML injection. This vulnerability is known as CVE-2023-48302. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Nextcloud Server and Enterprise Server up to 25.0.13/26.0.8/27.1.3 (Cloud Software). This affects an unknown part of the component HTML Code Handler. The manipulation with an unknown input leads to a html injection vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.13, 26.0.8, and 27.1.3 of Nextcloud Server and Nextcloud Enterprise Server, when a user is tricked into copy pasting HTML code without markup (Ctrl+Shift+V) the markup will actually render. Nextcloud Server and Nextcloud Enterprise Server versions 25.0.13, 26.0.8, and 27.1.3 contain a fix for this issue. As a workaround, disable app text.

The weakness was published 11/22/2023 as GHSA-p7g9-x25m-4h87. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2023-48302 since 11/14/2023. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Cloud Software

Vendor

• Nextcloud

Name

• Enterprise Server
• Server

Version

• 25.0.0
• 25.0.1
• 25.0.2
• 25.0.3
• 25.0.4
• 25.0.5
• 25.0.6
• 25.0.7
• 25.0.8
• 25.0.9
• 25.0.10
• 25.0.11
• 25.0.12
• 25.0.13
• 26.0.0
• 26.0.1
• 26.0.2
• 26.0.3
• 26.0.4
• 26.0.5
• 26.0.6
• 26.0.7
• 26.0.8
• 27.1.0
• 27.1.1
• 27.1.2
• 27.1.3

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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