CVE-2017-18892 | Mattermost Server up to 4.0.4/4.1.0 Email Template neutralization

VDB-355672 · CVE-2017-18892 · GCVE-0-2017-18892 MATTERMOST SERVER UP TO 4.0.4/4.1.0 EMAIL TEMPLATE NEUTRALIZATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.0 $0-$5k 1.61+ Summaryinfo A vulnerability, which was classified as critical, was found in Mattermost Server up to 4.0.4/4.1.0. This impacts an unknown function of the component Email Template Handler. Executing a manipulation can lead to neutralization. This vulnerability is tracked as CVE-2017-18892. The attack can be launched remotely. No exploit exists. You should upgrade the affected component. Detailsinfo A vulnerability classified as critical was found in Mattermost Server up to 4.0.4/4.1.0. This vulnerability affects some unknown functionality of the component Email Template Handler. The manipulation with an unknown input leads to a neutralization vulnerability. The CWE definition for the vulnerability is CWE-707. The product does not ensure or incorrectly ensures that structured messages or data are well-formed and that certain security properties are met before being read from an upstream component or sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes: An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. E-mail templates can have a field in which HTML content is not neutralized. The advisory is shared for download at mattermost.com. This vulnerability was named CVE-2017-18892 since 06/19/2020. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. Upgrading to version 4.0.5, 4.1.1 or 4.2.0 eliminates this vulnerability. Productinfo Type Groupware Software Vendor Mattermost Name Server Version 4.0 4.0.0 4.0.1 4.0.2 4.0.3 4.0.4 4.1.0 License open-source CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.2 VulDB Meta Temp Score: 6.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 NVD Base Score: 6.1 NVD Vector: 🔒 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: 🔍 NVD Base Score: 🔒 Exploitinginfo Class: Neutralization CWE: CWE-707 / CWE-20 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined EPSS Score: 🔒 EPSS Percentile: 🔒 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: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Server 4.0.5/4.1.1/4.2.0 Timelineinfo 06/19/2020 CVE reserved 04/06/2026 +2117 days Advisory disclosed 04/06/2026 +0 days VulDB entry created 04/06/2026 +0 days VulDB entry last update Sourcesinfo Advisory: mattermost.com Status: Confirmed CVE: CVE-2017-18892 (🔒) GCVE (CVE): GCVE-0-2017-18892 GCVE (VulDB): GCVE-100-355672 Entryinfo Created: 04/06/2026 23:32 Changes: 04/06/2026 23:32 (71) Complete: 🔍 Submitter: nike49424 Cache ID: 99:DFD:101 Submitinfo Accepted Submit #797475: #XSS | #EmailSecurity Mattermost TemplateInjection < 4.2.0 سيطرة كاملة على بيانات (by nike49424) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸