Zulip Server up to 2.1.2 Markdown cross site scripting

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Zulip Server up to 2.1.2. This impacts an unknown function. Executing a manipulation as part of Markdown can lead to cross site scripting. This vulnerability appears as CVE-2020-10935. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in Zulip Server up to 2.1.2. This vulnerability affects an unknown part. The manipulation as part of a Markdown leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. CVE summarizes:

Zulip Server before 2.1.3 allows XSS via a Markdown link, with resultant account takeover.

The weakness was presented 04/20/2020 (Website). The advisory is shared for download at blog.zulip.org. This vulnerability was named CVE-2020-10935 since 03/24/2020. The attack can be initiated remotely. A single 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 2.1.3 eliminates this vulnerability.

See VDB-154136 and VDB-154137 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.4
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

03/24/2020 🔍
04/20/2020 +27 days 🔍
04/21/2020 +1 days 🔍
10/10/2020 +172 days 🔍

Sourcesinfo

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

CVE: CVE-2020-10935 (🔍)
GCVE (CVE): GCVE-0-2020-10935
GCVE (VulDB): GCVE-100-154108
See also: 🔍

Entryinfo

Created: 04/21/2020 07:47
Updated: 10/10/2020 13:02
Changes: 04/21/2020 07:47 (40), 04/21/2020 07:52 (17), 10/10/2020 13:02 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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