Zulip Server up to 2.0.4 File Upload Stored cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Zulip Server up to 2.0.4. The affected element is an unknown function of the component File Upload. This manipulation causes cross site scripting (Stored). This vulnerability is handled as CVE-2019-16216. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Zulip Server up to 2.0.4 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component File Upload. The manipulation with an unknown input leads to a cross site scripting vulnerability (Stored). 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. The summary by CVE is:

Zulip server before 2.0.5 incompletely validated the MIME types of uploaded files. A user who is logged into the server could upload files of certain types to mount a stored cross-site scripting attack on other logged-in users. On a Zulip server using the default local uploads backend, the attack is only effective against browsers lacking support for Content-Security-Policy such as Internet Explorer 11. On a Zulip server using the S3 uploads backend, the attack is confined to the origin of the configured S3 uploads hostname and cannot reach the Zulip server itself.

The weakness was released 09/18/2019 (Website). The advisory is shared at blog.zulip.org. This vulnerability is known as CVE-2019-16216 since 09/11/2019. The attack can be launched remotely. The successful exploitation needs a single authentication. 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 2.0.5 eliminates this vulnerability.

Entry connected to this vulnerability is available at VDB-141960. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.1
VulDB Temp Score: 3.9
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

Name: Stored
Class: Cross site scripting / Stored
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 2.0.5
Patch: github.com

Timelineinfo

09/11/2019 🔍
09/18/2019 +7 days 🔍
09/19/2019 +1 days 🔍
12/26/2023 +1559 days 🔍

Sourcesinfo

Advisory: 1195841dfb9aa26b3b0dabc6f05d72e4af25be3e
Status: Not defined
Confirmation: 🔍

CVE: CVE-2019-16216 (🔍)
GCVE (CVE): GCVE-0-2019-16216
GCVE (VulDB): GCVE-100-141961
See also: 🔍

Entryinfo

Created: 09/19/2019 13:12
Updated: 12/26/2023 11:02
Changes: 09/19/2019 13:12 (58), 08/30/2020 10:28 (1), 12/26/2023 11:02 (5)
Complete: 🔍
Cache ID: 216::103

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

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