WordPress up to 4.9.4 JS File script-loader.php Request resource consumption

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.
6.2	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as problematic has been found in WordPress. Affected is an unknown function of the file wp-includes/script-loader.php of the component JS File Handler. Such manipulation as part of Request leads to resource consumption. This vulnerability is uniquely identified as CVE-2018-6389. The attack can be launched remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability was found in WordPress (Content Management System) and classified as problematic. Affected by this issue is an unknown part of the file wp-includes/script-loader.php of the component JS File Handler. The manipulation as part of a Request leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

In WordPress through 4.9.2, unauthenticated attackers can cause a denial of service (resource consumption) by using the large list of registered .js files (from wp-includes/script-loader.php) to construct a series of requests to load every file many times.

The bug was discovered 02/05/2018. The weakness was disclosed 02/06/2018 as EDB-ID 43968 as confirmed exploit (Exploit-DB). The advisory is shared for download at exploit-db.com. This vulnerability is handled as CVE-2018-6389 since 01/29/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1499.

A public exploit has been developed by Barak Tawily in Python and been published before and not just after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. By approaching the search of inurl:wp-includes/script-loader.php it is possible to find vulnerable targets with Google Hacking. The commercial vulnerability scanner Qualys is able to test this issue with plugin 11924 (WordPress load-scripts.php Denial of Service Vulnerability).

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

The vulnerability is also documented in the databases at Exploit-DB (43968), SecurityFocus (BID 103060†) and SecurityTracker (ID 1040347†). github.com is providing further details. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Content Management System

Name

• WordPress

Version

• 0.7.0
• 0.7.1
• 0.7.2
• 1.0
• 1.0 rc1
• 1.0.1
• 1.0.1 rc1
• 1.0.2
• 1.2
• 1.2 Beta
• 1.2 rc1
• 1.2 rc2
• 1.2.1
• 1.2.2
• 1.5
• 1.5.1
• 1.5.1.1
• 1.5.1.2
• 1.5.1.3
• 1.5.2
• 2.0
• 2.0 rc1
• 2.0.1
• 2.0.1 rc1
• 2.0.2
• 2.0.3
• 2.0.4
• 2.0.5
• 2.0.5 Beta1
• 2.0.5 rc1
• 2.0.6
• 2.0.6 Beta1
• 2.0.6 rc1
• 2.0.6 rc2
• 2.0.7
• 2.0.7 rc1
• 2.0.7 rc2
• 2.0.8
• 2.0.8 rc1
• 2.0.9
• 2.0.9 Beta1
• 2.0.9 rc1
• 2.0.10
• 2.0.10 rc1
• 2.0.10 rc2
• 2.0.10 rc3
• 2.0.11
• 2.1
• 2.1 Beta1
• 2.1 Beta2
• 2.1 Beta3
• 2.1 Beta4
• 2.1 rc1
• 2.1 rc2
• 2.1.1
• 2.1.1 Beta1
• 2.1.1 rc1
• 2.1.2
• 2.1.3
• 2.2
• 2.2 rc1
• 2.2 rc2
• 2.2.1
• 2.2.1 rc1
• 2.2.1 rc2
• 2.2.2
• 2.2.3
• 2.3
• 2.3 Beta1
• 2.3 Beta2
• 2.3 Beta3
• 2.3 rc1
• 2.3.1
• 2.3.1 Beta1
• 2.3.1 rc1
• 2.3.2
• 2.3.2 Beta1
• 2.3.2 Beta2
• 2.3.2 Beta3
• 2.3.2 rc1
• 2.3.3
• 2.5
• 2.5 rc1
• 2.5 rc2
• 2.5 rc3
• 2.5.1
• 2.6
• 2.6 Beta1
• 2.6 Beta2
• 2.6 Beta3
• 2.6 rc1
• 2.6.1
• 2.6.1 Beta1
• 2.6.1 Beta2
• 2.6.2
• 2.6.3
• 2.6.5
• 2.7
• 2.7 Beta1
• 2.7 Beta2
• 2.7 Beta3
• 2.7 rc1
• 2.7 rc2
• 2.7.1
• 2.8
• 2.8 Beta1
• 2.8 Beta2
• 2.8 rc1
• 2.8.1
• 2.8.1 Beta1
• 2.8.1 Beta2
• 2.8.1 rc1
• 2.8.2
• 2.8.3
• 2.8.4
• 2.8.4:a
• 2.8.5
• 2.8.5 Beta1
• 2.8.5.1
• 2.8.5.2
• 2.8.6
• 2.9
• 2.9 Beta1
• 2.9 Beta2
• 2.9 rc1
• 2.9.1
• 2.9.1 Beta1
• 2.9.1 rc1
• 2.9.1.1
• 2.9.2
• 3.0
• 3.0 Beta1
• 3.0 Beta2
• 3.0 rc1
• 3.0 rc2
• 3.0 rc3
• 3.0.1
• 3.0.2
• 3.0.3
• 3.0.4
• 3.0.5
• 3.0.6
• 3.1
• 3.1 Beta1
• 3.1 Beta2
• 3.1 rc1
• 3.1 rc2
• 3.1 rc3
• 3.1 rc4
• 3.1.1
• 3.1.1 rc1
• 3.1.2
• 3.1.3
• 3.1.4
• 3.2
• 3.2 Beta1
• 3.2 Beta2
• 3.2 rc1
• 3.2 rc2
• 3.2 rc3
• 3.2.1
• 3.3
• 3.3 Beta1
• 3.3 Beta2
• 3.3 Beta3
• 3.3 Beta4
• 3.3 rc1
• 3.3 rc2
• 3.3 rc3
• 3.3.1
• 3.3.2
• 3.3.2 rc1
• 3.3.3
• 3.4
• 3.4 Beta1
• 3.4 Beta2
• 3.4 Beta3
• 3.4 Beta4
• 3.4 rc1
• 3.4 rc2
• 3.4 rc3
• 3.4 rc4
• 3.4.0
• 3.4.1
• 3.4.2
• 3.5
• 3.5 Beta1
• 3.5 Beta2
• 3.5 Beta3
• 3.5 rc1
• 3.5 rc2
• 3.5 rc3
• 3.5 rc4
• 3.5.0
• 3.5.1
• 3.5.2
• 3.6
• 3.6 Beta1
• 3.6 Beta2
• 3.6 Beta3
• 3.6 Beta4
• 3.6 rc1
• 3.6 rc2
• 3.6.1
• 3.7
• 3.7 Beta1
• 3.7 Beta2
• 3.7 rc1
• 3.7 rc2
• 3.7.1
• 3.7.2
• 3.7.3
• 3.7.4
• 3.7.5
• 3.7.6
• 3.7.7
• 3.7.8
• 3.7.9
• 3.7.10
• 3.7.11
• 3.7.12
• 3.7.13
• 3.7.14
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• 3.7.17
• 3.7.18
• 3.7.19
• 3.7.20
• 3.7.21
• 3.7.22
• 3.7.23
• 3.7.24
• 3.7.25
• 3.8
• 3.8 Beta1
• 3.8 rc1
• 3.8 rc2
• 3.8.1
• 3.8.1 rc1
• 3.8.2
• 3.8.3
• 3.8.4
• 3.8.5
• 3.8.6
• 3.8.7
• 3.8.8
• 3.8.9
• 3.8.10
• 3.8.11
• 3.8.12
• 3.8.13
• 3.8.14
• 3.8.15
• 3.8.16
• 3.8.17
• 3.8.18
• 3.8.19
• 3.8.20
• 3.8.21
• 3.8.22
• 3.8.23
• 3.8.24
• 3.8.25
• 3.9
• 3.9 Beta1
• 3.9 Beta2
• 3.9 Beta3
• 3.9 rc1
• 3.9 rc2
• 3.9.0
• 3.9.1
• 3.9.1 rc1
• 3.9.2
• 3.9.3
• 3.9.4
• 3.9.5
• 3.9.6
• 3.9.7
• 3.9.8
• 3.9.9
• 3.9.10
• 3.9.11
• 3.9.12
• 3.9.13
• 3.9.14
• 3.9.15
• 3.9.16
• 3.9.17
• 3.9.18
• 3.9.19
• 3.9.20
• 3.9.21
• 3.9.22
• 3.9.23
• 4.0
• 4.0 Beta1
• 4.0 Beta2
• 4.0 Beta3
• 4.0 Beta4
• 4.0 rc1
• 4.0 rc2
• 4.0.1
• 4.0.2
• 4.0.3
• 4.0.4
• 4.0.5
• 4.0.6
• 4.0.7
• 4.0.8
• 4.0.9
• 4.0.10
• 4.0.11
• 4.0.12
• 4.0.13
• 4.0.14
• 4.0.15
• 4.0.16
• 4.0.17
• 4.0.18
• 4.0.19
• 4.0.20
• 4.0.21
• 4.0.22
• 4.1
• 4.1 Beta1
• 4.1 Beta2
• 4.1 rc1
• 4.1 rc2
• 4.1 rc3
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 4.1.6
• 4.1.7
• 4.1.8
• 4.1.9
• 4.1.10
• 4.1.11
• 4.1.12
• 4.1.13
• 4.1.14
• 4.1.15
• 4.1.16
• 4.1.17
• 4.1.18
• 4.1.19
• 4.1.20
• 4.1.21
• 4.1.22
• 4.2
• 4.2 Beta1
• 4.2 Beta2
• 4.2 Beta3
• 4.2 Beta4
• 4.2 rc1
• 4.2 rc2
• 4.2 rc3
• 4.2 rc4
• 4.2.1
• 4.2.2
• 4.2.3
• 4.2.4
• 4.2.4 rc1
• 4.2.5
• 4.2.6
• 4.2.7
• 4.2.8
• 4.2.9
• 4.2.10
• 4.2.11
• 4.2.12
• 4.2.13
• 4.2.14
• 4.2.15
• 4.2.16
• 4.2.17
• 4.2.18
• 4.2.19
• 4.3
• 4.3 Beta1
• 4.3 Beta2
• 4.3 Beta3
• 4.3 Beta4
• 4.3 rc1
• 4.3 rc2
• 4.3 rc3
• 4.3.0
• 4.3.1
• 4.3.2
• 4.3.3
• 4.3.4
• 4.3.5
• 4.3.6
• 4.3.7
• 4.3.8
• 4.3.9
• 4.3.10
• 4.3.11
• 4.3.12
• 4.3.13
• 4.3.14
• 4.3.15
• 4.4
• 4.4 Beta1
• 4.4 Beta2
• 4.4 Beta3
• 4.4 Beta4
• 4.4 rc1
• 4.4.0
• 4.4.1
• 4.4.2
• 4.4.3
• 4.4.4
• 4.4.5
• 4.4.6
• 4.4.7
• 4.4.8
• 4.4.9
• 4.4.10
• 4.4.11
• 4.4.12
• 4.4.13
• 4.4.14
• 4.5
• 4.5 Beta1
• 4.5 Beta2
• 4.5 Beta3
• 4.5 Beta4
• 4.5 rc1
• 4.5 rc2
• 4.5 rc3
• 4.5.1
• 4.5.1 rc1
• 4.5.1 rc2
• 4.5.2
• 4.5.3
• 4.5.4
• 4.5.5
• 4.5.6
• 4.5.7
• 4.5.8
• 4.5.9
• 4.5.10
• 4.5.11
• 4.5.12
• 4.5.13
• 4.6
• 4.6 Beta1
• 4.6 Beta2
• 4.6 Beta3
• 4.6 Beta4
• 4.6 rc1
• 4.6 rc2
• 4.6 rc3
• 4.6 rc4
• 4.6.1
• 4.6.1 rc1
• 4.6.2
• 4.6.3
• 4.6.4
• 4.6.5
• 4.6.6
• 4.6.7
• 4.6.8
• 4.6.9
• 4.6.10
• 4.7
• 4.7 Beta1
• 4.7 Beta2
• 4.7 Beta3
• 4.7 Beta4
• 4.7 rc1
• 4.7 rc2
• 4.7 rc3
• 4.7.1
• 4.7.1 rc1
• 4.7.2
• 4.7.3
• 4.7.3 rc1
• 4.7.4
• 4.7.4 rc1
• 4.7.5
• 4.7.6
• 4.7.7
• 4.7.8
• 4.7.9
• 4.8
• 4.8 Beta1
• 4.8 Beta2
• 4.8 rc1
• 4.8 rc2
• 4.8.1
• 4.8.1 Beta1
• 4.8.1 rc1
• 4.8.1 rc2
• 4.8.2
• 4.8.3
• 4.8.4
• 4.8.5
• 4.9
• 4.9 Beta1
• 4.9 Beta2
• 4.9 Beta3
• 4.9 Beta4
• 4.9 rc1
• 4.9 rc2
• 4.9 rc3
• 4.9.1
• 4.9.1 Beta1
• 4.9.2
• 4.9.3
• 4.9.3 Beta1
• 4.9.3 rc1
• 4.9.4

License

• open-source

Website

• Product: https://wordpress.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

Video

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

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: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Barak Tawily
Programming Language: 🔍
Download: 🔍
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

OpenVAS ID: 63366
OpenVAS Name: WordPress load-scripts.php Denial of Service Vulnerability (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/29/2018 🔍
02/05/2018 +7 days 🔍
02/05/2018 +0 days 🔍
02/05/2018 +0 days 🔍
02/05/2018 +0 days 🔍
02/06/2018 +1 days 🔍
02/06/2018 +0 days 🔍
02/07/2018 +1 days 🔍
02/08/2018 +1 days 🔍
03/16/2025 +2593 days 🔍

Sourcesinfo

Product: wordpress.com

Advisory: EDB-ID 43968
Researcher: Barak Tawily
Status: Confirmed

CVE: CVE-2018-6389 (🔍)
GCVE (CVE): GCVE-0-2018-6389
GCVE (VulDB): GCVE-100-112892
SecurityFocus: 103060 - WordPress CVE-2018-6389 Denial of Service Vulnerability
SecurityTracker: 1040347

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍

Entryinfo

Created: 02/07/2018 08:29
Updated: 03/16/2025 12:02
Changes: 02/07/2018 08:29 (85), 06/07/2020 16:05 (1), 02/02/2021 16:27 (2), 03/16/2025 12:02 (15)
Complete: 🔍
Cache ID: 216::103

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