WordPress up to 4.8.3 Access Restriction wp-admin/user-new.php String access control

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.
7.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in WordPress and classified as critical. This affects an unknown part of the file wp-admin/user-new.php of the component Access Restriction. Such manipulation as part of String leads to access control. This vulnerability is documented as CVE-2017-17091. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in WordPress (Content Management System) and classified as critical. Affected by this issue is an unknown code of the file wp-admin/user-new.php of the component Access Restriction. The manipulation as part of a String leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

wp-admin/user-new.php in WordPress before 4.9.1 sets the newbloguser key to a string that can be directly derived from the user ID, which allows remote attackers to bypass intended access restrictions by entering this string.

The bug was discovered 11/29/2017. The weakness was released 12/02/2017 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is handled as CVE-2017-17091 since 12/02/2017. The exploitation is known to be easy. The attack may be launched remotely. A simple authentication is needed for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $5k-$25k. By approaching the search of inurl:wp-admin/user-new.php it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 105423 (Debian DLA-1216-1 : wordpress security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176269 (Debian Security Update for wordpress (DSA 4090-1)).

Upgrading to version 3.7.24, 3.8.24, 3.9.22, 4.0.21, 4.1.21, 4.2.18, 4.3.14, 4.4.13, 4.5.12, 4.6.9, 4.7.8, 4.8.4 or 4.9.1 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (105423) and SecurityFocus (BID 102024†). Entries connected to this vulnerability are available at VDB-108908, VDB-110157, VDB-110158 and VDB-110159. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Content Management System

Name

• WordPress

Version

• 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
• 2.1
• 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
• 2.3
• 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
• 3.7.15
• 3.7.16
• 3.7.17
• 3.7.18
• 3.7.19
• 3.7.20
• 3.7.21
• 3.7.22
• 3.7.23
• 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
• 3.9
• 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
• 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
• 4.1
• 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
• 4.2
• 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
• 4.3
• 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
• 4.4
• 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
• 4.5
• 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
• 4.6
• 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
• 4.7
• 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
• 4.8
• 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

License

• open-source

Website

• Product: https://wordpress.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
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: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 105423
Nessus Name: Debian DLA-1216-1 : wordpress security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 66496
OpenVAS Name: WordPress < 4.9.1 Multiple Vulnerabilities (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: WordPress 3.7.24/3.8.24/3.9.22/4.0.21/4.1.21/4.2.18/4.3.14/4.4.13/4.5.12/4.6.9/4.7.8/4.8.4/4.9.1
Patch: github.com

Timelineinfo

11/28/2017 🔍
11/29/2017 +1 days 🔍
12/02/2017 +3 days 🔍
12/02/2017 +0 days 🔍
12/02/2017 +0 days 🔍
12/02/2017 +0 days 🔍
12/21/2017 +19 days 🔍
12/26/2017 +5 days 🔍
01/16/2023 +1847 days 🔍

Sourcesinfo

Product: wordpress.com

Advisory: eaf1cfdc1fe0bdffabd8d879c591b864d833326c⛔
Researcher: Rahul Pratap Singh, John Blackbourn.
Status: Confirmed

CVE: CVE-2017-17091 (🔍)
GCVE (CVE): GCVE-0-2017-17091
GCVE (VulDB): GCVE-100-110156

OVAL: 🔍

SecurityFocus: 102024 - WordPress Prior to 4.9.1 Multiple Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 12/02/2017 19:44
Updated: 01/16/2023 16:02
Changes: 12/02/2017 19:44 (82), 06/07/2020 16:20 (2), 01/25/2021 16:58 (3), 01/16/2023 15:56 (4), 01/16/2023 16:02 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

Do you need the next level of professionalism?

Upgrade your account now!