PT-2026-141852

CVE-2026-63010

Published

2026-11-10

Updated

2026-11-10

Description by

CVSS 4.0

8.7

High

MetricsAV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions Group-Office versions prior to 6.8.172 Group-Office versions prior to 25.0.108 Group-Office versions prior to 26.0.33

Description A low-privileged user can create manual reminders containing arbitrary HTML or JavaScript and assign them to other users, including administrators. When the victim's browser polls for pending notifications, the payload is rendered unsanitized as innerHTML within the ExtJS notification panel. This results in Stored Cross-Site Scripting (XSS), a condition where malicious scripts are permanently stored on the server and executed in the victim's browser, which can lead to a full Account Takeover (ATO) of the victim's session.

Recommendations Update to version 6.8.172 or newer. Update to version 25.0.108 or newer. Update to version 26.0.33 or newer.

Exploitability

Exploit

Fix

Impacts

Researchers

Numberoreo1

Vendors

Affected products

Weakness enumeration

CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

CWE-79: Improper Neutralization of Input During Web Page Generation (\'Cross-site Scripting\')