CVE-2026-33368 | Zimbra Collaboration Suite 10.0/10.1 Webmail REST Interface /h/rest cross site scripting

VDB-352086 · CVE-2026-33368 · GCVE-0-2026-33368 ZIMBRA COLLABORATION SUITE 10.0/10.1 WEBMAIL REST INTERFACE /H/REST CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.3 $0-$5k 2.12+ Summaryinfo A vulnerability classified as problematic was found in Zimbra Collaboration Suite 10.0/10.1. This impacts an unknown function of the file /h/rest of the component Webmail REST Interface. The manipulation results in cross site scripting. This vulnerability is identified as CVE-2026-33368. The attack can be executed remotely. There is not any exploit available. Detailsinfo A vulnerability was found in Zimbra Collaboration Suite 10.0/10.1. It has been classified as problematic. Affected is an unknown function of the file /h/rest of the component Webmail REST Interface. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes: Zimbra Collaboration Suite (ZCS) 10.0 and 10.1 contains a reflected cross-site scripting (XSS) vulnerability in the Classic Webmail REST interface (/h/rest). The application fails to properly sanitize user-supplied input, allowing an unauthenticated attacker to inject malicious JavaScript into a crafted URL. When a victim user accesses the link, the injected script executes in the context of the Zimbra webmail application, which could allow the attacker to perform actions on behalf of the victim. The advisory is available at wiki.zimbra.com. This vulnerability is traded as CVE-2026-33368 since 03/19/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type Groupware Software Vendor Zimbra Name Collaboration Suite Version 10.0 10.1 CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.3 VulDB Meta Temp Score: 4.3 VulDB Base Score: 4.3 VulDB Temp Score: 4.3 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Cross site scripting CWE: CWE-79 / CWE-94 / CWE-74 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/19/2026 CVE reserved 03/20/2026 +1 days Advisory disclosed 03/20/2026 +0 days VulDB entry created 03/20/2026 +0 days VulDB entry last update Sourcesinfo Advisory: wiki.zimbra.com Status: Not defined CVE: CVE-2026-33368 (🔒) GCVE (CVE): GCVE-0-2026-33368 GCVE (VulDB): GCVE-100-352086 Entryinfo Created: 03/20/2026 15:48 Changes: 03/20/2026 15:48 (55) Complete: 🔍 Cache ID: 99:D82:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸