CVE-2026-33370 | Zimbra Collaboration Suite 10.0/10.1 Briefcase Feature cross site scripting

VDB-352085 · CVE-2026-33370 · GCVE-0-2026-33370 ZIMBRA COLLABORATION SUITE 10.0/10.1 BRIEFCASE FEATURE CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.5 $0-$5k 1.66+ Summaryinfo A vulnerability classified as problematic has been found in Zimbra Collaboration Suite 10.0/10.1. This affects an unknown function of the component Briefcase Feature. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2026-33370. Remote exploitation of the attack is possible. No exploit is available. Detailsinfo A vulnerability was found in Zimbra Collaboration Suite 10.0/10.1 and classified as problematic. This issue affects some unknown processing of the component Briefcase Feature. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. The summary by CVE is: 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 scripts, the embedded JavaScript executes in the context of the user's session. This allows an attacker to run arbitrary scripts, potentially leading to data exfiltration or other unauthorized actions on behalf of the victim user. The advisory is shared at wiki.zimbra.com. The identification of this vulnerability is CVE-2026-33370 since 03/19/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue. 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: 3.5 VulDB Meta Temp Score: 3.5 VulDB Base Score: 3.5 VulDB Temp Score: 3.5 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: Confirmed CVE: CVE-2026-33370 (🔒) GCVE (CVE): GCVE-0-2026-33370 GCVE (VulDB): GCVE-100-352085 Entryinfo Created: 03/20/2026 15:48 Changes: 03/20/2026 15:48 (54) Complete: 🔍 Cache ID: 99:822:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸