Zulip Server up to 2.1.2 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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4.9$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Zulip Server up to 2.1.2. Impacted is an unknown function. Performing a manipulation as part of Markdown results in cross site scripting. This vulnerability is reported as CVE-2020-9445. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Zulip Server up to 2.1.2. This affects an unknown code. The manipulation as part of a Markdown 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. The summary by CVE is:

Zulip Server before 2.1.3 allows XSS via the modal_link feature in the Markdown functionality.

The weakness was disclosed 04/20/2020 (Website). The advisory is shared at blog.zulip.org. This vulnerability is uniquely identified as CVE-2020-9445 since 02/28/2020. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. 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.

Upgrading to version 2.1.3 eliminates this vulnerability.

The entries VDB-154108 and VDB-154136 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Server 2.1.3

Timelineinfo

02/28/2020 🔍
04/20/2020 +52 days 🔍
04/21/2020 +1 days 🔍
10/10/2020 +172 days 🔍

Sourcesinfo

Advisory: blog.zulip.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-9445 (🔍)
GCVE (CVE): GCVE-0-2020-9445
GCVE (VulDB): GCVE-100-154137
See also: 🔍

Entryinfo

Created: 04/21/2020 09:32
Updated: 10/10/2020 17:42
Changes: 04/21/2020 09:32 (40), 04/21/2020 09:37 (17), 10/10/2020 17:42 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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