Nextcloud Server up to 18.0.10/19.0.4/20.0.1 Markdown cross site scripting
|CVSS Meta Temp Score|
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|Current Exploit Price (≈)|
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|CTI Interest Score|
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A vulnerability was found in Nextcloud Server up to 18.0.10/19.0.4/20.0.1 (Cloud Software). It has been rated as problematic. Affected by this issue is an unknown part of the component Markdown Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. Impacted is integrity. An attacker might be able to inject arbitrary html and script code into the web site. This would alter the appearance and would make it possible to initiate further attacks against site visitors. CVE summarizes:
The weakness was disclosed 02/04/2021 as https:/hackerone.com/reports/1023787. The advisory is shared for download at nextcloud.com. This vulnerability is handled as CVE-2020-8294 since 01/28/2020. The exploitation is known to be easy. The attack may be launched remotely. A simple authentication is necessary for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.
Upgrading to version 18.0.11, 19.0.5 or 20.0.2 eliminates this vulnerability.
CVSSv3VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4
VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
ExploitingClass: Cross site scripting
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒
Threat IntelligenceThreat: 🔍
0-Day Time: 🔒
Upgrade: Server 18.0.11/19.0.5/20.0.2
Timeline01/28/2020 CVE assigned
02/04/2021 +373 days Advisory disclosed
02/04/2021 +0 days VulDB entry created
02/23/2021 +19 days VulDB last update
CVE: CVE-2020-8294 (🔒)
EntryCreated: 02/04/2021 10:38 AM
Updated: 02/23/2021 01:00 PM
Changes: (6) source_cve_assigned source_cve_nvd_summary advisory_confirm_url vulnerability_cvss2_vuldb_tempscore vulnerability_cvss3_vuldb_tempscore vulnerability_cvss3_meta_tempscore
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