PT-2023-8885 · Nextcloud+2 · Nextcloud Server+2

Max-Nextcloud · Published 2023-11-21 · Updated 2025-01-24 · CVE-2023-48302

Positive Technologies (AI Summary)

CVSS v2.0

5.5

Medium

Base vector

AV:N/AC:L/Au:S/C:P/I:P/A:N

Name of the Vulnerable Software and Affected Versions Nextcloud Server versions 25.0.0 through 25.0.12 Nextcloud Server versions 26.0.0 through 26.0.7 Nextcloud Server versions 27.0.0 through 27.1.2

Description The issue is related to the rendering of HTML code without markup when a user copy-pastes it using Ctrl+Shift+V. This can lead to cross-site scripting (XSS) attacks.

Recommendations For Nextcloud Server versions 25.0.0 through 25.0.12, update to version 25.0.13 or later. For Nextcloud Server versions 26.0.0 through 26.0.7, update to version 26.0.8 or later. For Nextcloud Server versions 27.0.0 through 27.1.2, update to version 27.1.3 or later. As a temporary workaround, consider disabling the app text until a patch is available.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

ALT-PU-2023-7785

ALT-PU-2023-7786

ALT-PU-2024-1230

ALT-PU-2025-1855

BDU:2024-02548

CVE-2023-48302

GHSA-P7G9-X25M-4H87

Affected Products

Alt Linux

Nextcloud Server

Red Os

References · 10

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/48xxx/CVE-2023-48302.json · Exploit
• https://github.com/nextcloud/text/pull/4877 · Patch
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p7g9-x25m-4h87 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-48302 · Security Note
• https://bdu.fstec.ru/vul/2024-02548 · Security Note
• https://osv.dev/vulnerability/CVE-2023-48302 · Vendor Advisory
• https://redos.red-soft.ru/support/secure · Note
• https://t.me/cvenotify/61702 · Telegram Post
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-nextcloud-cve-2023-48301-cve-2023-48302 · Note
• https://hackerone.com/reports/2211561 · Note