What is the CVSS score of CVE-2019-11358?

CVE-2019-11358 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 87.2%.

Is there a public PoC exploit available for CVE-2019-11358?

Yes, a public proof-of-concept exploit is available for CVE-2019-11358. Prioritise patching immediately. EPSS: 87.2%.

Is there a patch available for CVE-2019-11358?

Yes, a patch is available for CVE-2019-11358. Update the affected software to the latest version immediately.

Jquery CVE-2019-11358

MEDIUM

Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) (CWE-1321)

2019-04-20 cve@mitre.org

6.1

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-1321 ASVS 5.0 V3 - Web Frontend Security Prototype pollution prevention MITRE ATT&CK 2 techniques across 2 tactics: Execution, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	A remote attacker could modify object prototypes to inject properties affecting application logic by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 87.2% exploitation probability (EPSS)

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AnalysisAI

jQuery before 3.4.0, as used in Drupal, Backdrop CMS, and other products, mishandles jQuery.extend(true, {}, ...) because of Object.prototype pollution. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Freeze prototypes, validate object keys, avoid recursive merging of untrusted data.

Affected Packages

composer django fix: 2.1.9, 2.2.2

composer drupal/core fix: 8.5.15, 8.6.15

composer jquery fix: 3.4.0

composer jquery-rails fix: 4.3.4

composer maximebf/debugbar fix: 1.19.0

composer org.webjars.npm:jquery fix: 3.4.0

maven django fix: 2.1.9, 2.2.2

maven jquery fix: 3.4.0

maven jquery-rails fix: 4.3.4

maven maximebf/debugbar fix: 1.19.0

maven org.webjars.npm:jquery fix: 3.4.0

npm django fix: 2.1.9, 2.2.2

npm jquery fix: 3.4.0

npm jquery-rails fix: 4.3.4

npm maximebf/debugbar fix: 1.19.0

npm org.webjars.npm:jquery fix: 3.4.0

nuget django fix: 2.1.9, 2.2.2

nuget jquery fix: 3.4.0

nuget jquery-rails fix: 4.3.4

nuget maximebf/debugbar fix: 1.19.0

nuget org.webjars.npm:jquery fix: 3.4.0

pypi django fix: 2.1.9, 2.2.2

pypi jquery fix: 3.4.0

pypi jquery-rails fix: 4.3.4

pypi maximebf/debugbar fix: 1.19.0

pypi org-webjars-npm:jquery fix: 3.4.0

rubygems django fix: 2.1.9, 2.2.2

rubygems jquery fix: 3.4.0

rubygems jquery-rails fix: 4.3.4

rubygems maximebf/debugbar fix: 1.19.0

rubygems org.webjars.npm:jquery fix: 3.4.0

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 7 packages in composer, maven, npm and 3 more

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) (CWE-1321), which allows attackers to modify object prototypes to inject properties affecting application logic. jQuery before 3.4.0, as used in Drupal, Backdrop CMS, and other products, mishandles jQuery.extend(true, {}, ...) because of Object.prototype pollution. If an unsanitized source object contained an enumerable __proto__ property, it could extend the native Object.prototype. Affected products include: Jquery, Debian Debian Linux, Drupal, Backdropcms Backdrop, Fedoraproject Fedora. Version information: before 3.4.0.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

DescriptionNVD

jQuery before 3.4.0, as used in Drupal, Backdrop CMS, and other products, mishandles jQuery.extend(true, {}, ...) because of Object.prototype pollution. If an unsanitized source object contained an enumerable __proto__ property, it could extend the native Object.prototype.

Threat Intelligence Overview

EPSS Score

87.2%

Top 0% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

Exploit-DB

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC Yes

EPSS 87.2%

Patch available Yes

Active threat Yes

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

137

Low Medium High Critical

KEV: 0

EPSS: +87

CVSS: +30

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.