Vulnerability Report

CVE-2025-48700

CISA KEV Active

Title: Synacor Zimbra Collaboration Suite Auth Bypass

Auth Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2025-48700.

CWE Category CWE-79

Published Date Jun 23, 2025

Modified Date Apr 21, 2026

Exploit Status Not Found

Score 6.1 CVSS v3.1

Exploit Probability (EPSS)

18.19%

Vulnerability Summary

CVE-2025-48700: An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0 and 10.0 and 10.1. A Cross-Site Scripting (XSS) vulnerability in the Zimbra Classic UI allows attackers to execute arbitrary JavaScript within the user's session, potentially leading to unauthorized access to sensitive information. This issue arises from insufficient sanitization of HTML content, specifically involving crafted tag structures and attribute values that include an @import directive and other script injection vectors. The vulnerability is triggered when a user views a crafted e-mail message in the Classic UI, requiring no additional user interaction.

Impacted Vendors

synacor 1

zimbra 1

Reference Links

https://wiki.zimbra.com/wiki/Security_Center https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

CVSS v3.1

Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0

Severity MEDIUM

6.1

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

REQUIRED

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

CHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2025-48700 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

April 21, 2026 MODIFIED

Vulnerability data updated via NVD.

April 21, 2026 MODIFIED

Vulnerability data updated via NVD.

April 21, 2026 MODIFIED

Vulnerability data updated via NVD.

April 20, 2026 MODIFIED

Vulnerability data updated via NVD.

July 11, 2025 MODIFIED

Vulnerability data or affected products updated.

June 23, 2025 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction REQUIRED

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected Stack

No specific products linked.