VDB-173844 · CVE-2021-20086 · GCVE-0-2021-20086

jquery-bbq 1.2.1 Prototype Object.prototype code injection

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.
7.1	$0-$5k	0.00

Summaryinfo

A vulnerability was found in jquery-bbq 1.2.1. It has been declared as critical. Affected by this vulnerability is the function Object.prototype of the component Prototype Handler. The manipulation results in code injection. This vulnerability is cataloged as CVE-2021-20086. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in jquery-bbq 1.2.1 (JavaScript Library). Affected is the function Object.prototype of the component Prototype Handler. The manipulation with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was shared 04/24/2021. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2021-20086. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

JavaScript Library

Name

jquery-bbq

Version

1.2.1

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 7.1

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/17/2020 🔍
04/24/2021 +127 days 🔍
04/24/2021 +0 days 🔍
11/04/2025 +1655 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2021-20086 (🔍)
GCVE (CVE): GCVE-0-2021-20086
GCVE (VulDB): GCVE-100-173844

Entryinfo

Created: 04/24/2021 09:46
Updated: 11/04/2025 04:09
Changes: 04/24/2021 09:46 (37), 04/29/2021 12:37 (2), 11/04/2025 04:09 (33)
Complete: 🔍
Cache ID: 216::103