AEGLIX vulnerability intelligence
CVE-2025-27915
MEDIUM · CVSS 5.4 · Analyzed
Published: 2025-03-12 · Updated: 2026-06-17 · Source: NVD
Vulnerability overview
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 <details> 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.
Severity and scoring
- CVSS score
- 5.4 · MEDIUM
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-79
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Synacor · Zimbra Collaboration Suite (ZCS)
- Added to catalog
- 2025-10-07
- Required action
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA remediation due date
- 2025-10-28
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*
From (inclusive): 10.0.0
Before (exclusive): 10.0.13
cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*
From (inclusive): 10.1.0
Before (exclusive): 10.1.5
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:-:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p1:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p10:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p11:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p12:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p13:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p14:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p15:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p16:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p17:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p18:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p19:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p2:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p20:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p21:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p22:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p23:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p24:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p24.1:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p25:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p26:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p27:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p28:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p29:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p3:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p30:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p31:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p32:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p33:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p34:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p35:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p36:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p37:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p38:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p39:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p4:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p40:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p41:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p42:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p43:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p5:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p6:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p7:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p8:*:*:*:*:*:*
cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p9:*:*:*:*:*:*
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://wiki.zimbra.com/wiki/Security_Center
Release Notes
- https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.13#Security_Fixes
Release Notes
- https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.5#Security_Fixes
Release Notes
- https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P44#Security_Fixes
Release Notes
- https://strikeready.com/blog/0day-ics-attack-in-the-wild/
Exploit · Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-27915
US Government Resource