CVE-2026-73575: Cross-Site Request Forgery (CSRF)

In Zimbra Collaboration ZCS before 10.1.17, a Cross-Site Request Forgery CSRF vulnerability exists in the Exchange Web Services EWS endpoint of Zimbra Collaboration ZCS due to insufficient validation of request content types. An attacker can exploit this vulnerability by causing an authenticated...

CVE-2026-73570: Improper Neutralization of Special Elements used in an OS Command

A remote code execution vulnerability exists in Zimbra Collaboration ZCS before 10.1.20 when the optional zimbra-snmp package is installed and SNMP notifications are enabled. Due to improper sanitization of untrusted input during SNMP notification processing, an unauthenticated attacker can send...

CVE-2026-73571: Incorrect Authorization

An authorization bypass vulnerability exists in Zimbra Collaboration ZCS before 10.1.17 due to improper authorization validation in delegated email sending functionality. An authenticated attacker can send specially crafted SOAP requests to impersonate another user and send emails without...

CVE-2026-73572: Improper Neutralization of Input During Web Page Generation

In Zimbra Collaboration ZCS before 10.1.17, a stored cross-site scripting XSS vulnerability exists in the Zimbra Classic Web Client due to insufficient sanitization of specific attachment content during inline preview. An attacker can send a crafted email containing a malicious attachment that,...

CVE-2026-73573: Path Traversal: '../filedir'

In Zimbra Collaboration ZCS before 10.1.17, a path traversal vulnerability exists in the Zimbra Briefcase document editing functionality due to improper validation of the packages parameter. An authenticated attacker can exploit this vulnerability by supplying a crafted path traversal sequence,...

CVE-2026-33371: Improper Restriction of XML External Entity Reference

An issue was discovered in Zimbra Collaboration ZCS 10.0 and 10.1. An XML External Entity XXE vulnerability exists in the Zimbra Exchange Web Services EWS SOAP interface due to improper handling of XML input. An authenticated attacker can submit crafted XML data that is processed by an XML parser...

CVE-2026-33372: Cross-Site Request Forgery (CSRF)

An issue was discovered in Zimbra Collaboration ZCS 10.0 and 10.1. A cross-site request forgery CSRF vulnerability exists in Zimbra Webmail due to improper validation of CSRF tokens. The application accepts CSRF tokens supplied within the request body instead of requiring them through the expecte...

CVE-2026-33370: Improper Neutralization of Input During Web Page Generation

An issue was discovered in Zimbra Collaboration ZCS 10.0 and 10.1. A stored cross-site scripting XSS vulnerability exists in the Zimbra Briefcase feature due to insufficient sanitization of specific uploaded file types. When a user opens a publicly shared Briefcase file containing malicious...

CVE-2026-33369: Improper Input Validation

Zimbra Collaboration ZCS 10.0 and 10.1 contains an LDAP injection vulnerability in the Mailbox SOAP service within a FolderAction operation. The application fails to properly sanitize user-supplied input before incorporating it into an LDAP search filter. An authenticated attacker can exploit thi...

CVE-2025-66376: Improper Neutralization of Input During Web Page Generation

Zimbra Collaboration ZCS 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets CSS @import directives in an HTML e-mail message...

CVE-2025-68645: Improper Control of Filename for Include/Require Statement in PHP Program

A Local File Inclusion LFI vulnerability exists in the Webmail Classic UI of Zimbra Collaboration ZCS 10.0 and 10.1 because of improper handling of user-supplied request parameters in the RestFilter servlet. An unauthenticated remote attacker can craft requests to the /h/rest endpoint to influenc...

CVE-2025-62763: Server-Side Request Forgery (SSRF)

Zimbra Collaboration ZCS before 10.1.12 allows SSRF because of the configuration of the chat proxy...

CVE-2025-54390: Cross-Site Request Forgery (CSRF)

A Cross-Site Request Forgery CSRF vulnerability exists in the ResetPasswordRequest operation of Zimbra Collaboration ZCS when the zimbraFeatureResetPasswordStatus attribute is enabled. An attacker can exploit this by tricking an authenticated user into visiting a malicious webpage that silently...

CVE-2025-54391: Improper Access Control

A vulnerability in the EnableTwoFactorAuthRequest SOAP endpoint of Zimbra Collaboration ZCS allows an attacker with valid user credentials to bypass Two-Factor Authentication 2FA protection. The attacker can configure an additional 2FA method either a third-party authenticator app or email-based...

CVE-2025-53645: Uncontrolled Resource Consumption

Zimbra Collaboration ZCS before 9.0.0 Patch 46, 10.0.x before 10.0.15, and 10.1.x before 10.1.9 is vulnerable to a denial of service condition due to improper handling of excessive, comma-separated path segments in the Admin Console. An unauthenticated remote attacker can send specially crafted G...

CVE-2025-48700: Improper Neutralization of Input During Web Page Generation

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...

CVE-2024-45516: Improper Neutralization of Input During Web Page Generation

An issue was discovered in Zimbra Collaboration ZCS 9.0.0 before Patch 43, 10.0.x before 10.0.12, 10.1.x before 10.1.4, and 8.8.15 before Patch 47. A Cross-Site Scripting XSS vulnerability in the Zimbra Classic UI allows attackers to execute arbitrary JavaScript within the user's session,...

CVE-2025-27915: Improper Neutralization of Input During Web Page Generation

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...

CVE-2025-27914: Improper Neutralization of Input During Web Page Generation

An issue was discovered in Zimbra Collaboration ZCS 9.0 and 10.0 and 10.1. A Reflected Cross-Site Scripting XSS vulnerability exists in the /h/rest endpoint, allowing authenticated attackers to inject and execute arbitrary JavaScript in a victim's session. Exploitation requires a valid auth token...

CVE-2024-45194: Improper Neutralization of Input During Web Page Generation

In Zimbra Collaboration ZCS 9.0 and 10.0, a vulnerability in the Webmail Modern UI allows execution of stored Cross-Site Scripting XSS payloads. An attacker with administrative access to the Zimbra Administration Panel can inject malicious JavaScript code while configuring an email account. This...