CVE-2025-27915: An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0 and 10.1. A stored cross-site scripting (XSS) vulnerability exists in the...
Description
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0 and 10.1. A stored cross-site scripting (XSS) vulnerability exists in the Classic Web Client due to insufficient sanitization of HTML content in ICS files. When a user views an e-mail message containing a malicious ICS entry, its embedded JavaScript executes via an ontoggle event inside a tag. This allows an attacker to run arbitrary JavaScript within the victim's session, potentially leading to unauthorized actions such as setting e-mail filters to redirect messages to an attacker-controlled address. As a result, an attacker can perform unauthorized actions on the victim's account, including e-mail redirection and data exfiltration.
Classification
CVE ID: CVE-2025-27915
Affected Products
Vendor: n/a
Product: n/a
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.03% (probability of being exploited)
EPSS Percentile: 6.11% (scored less or equal to compared to others)
EPSS Date: 2025-04-10 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-27915https://wiki.zimbra.com/wiki/Security_Center
https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.5#Security_Fixes
https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.13#Security_Fixes
https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P44#Security_Fixes