VDB-174932 · CVE-2021-27733 · GCVE-0-2021-27733

JetBrains YouTrack prior 2020.6.6441 Issue Attachment 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 (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.4	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in JetBrains YouTrack. Affected is an unknown function of the component Issue Attachment Handler. Such manipulation leads to cross site scripting. This vulnerability is uniquely identified as CVE-2021-27733. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in JetBrains YouTrack. It has been rated as problematic. Affected by this issue is some unknown functionality of the component Issue Attachment Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity.

The weakness was disclosed 05/12/2021. The advisory is shared for download at blog.jetbrains.com. This vulnerability is handled as CVE-2021-27733. 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 2020.6.6441 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Bug Tracking Software

Vendor

JetBrains

Name

YouTrack

License

free

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB 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: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

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: 🔍

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: 🔍

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: YouTrack 2020.6.6441

Timelineinfo

02/25/2021 🔍
05/12/2021 +75 days 🔍
05/12/2021 +0 days 🔍
05/15/2021 +3 days 🔍

Sourcesinfo

Advisory: blog.jetbrains.com
Status: Confirmed

CVE: CVE-2021-27733 (🔍)
GCVE (CVE): GCVE-0-2021-27733
GCVE (VulDB): GCVE-100-174932

Entryinfo

Created: 05/12/2021 10:00
Updated: 05/15/2021 11:27
Changes: 05/12/2021 10:00 (37), 05/15/2021 11:27 (5)
Complete: 🔍
Cache ID: 216::103