vBulletin up to 5.5.4 ajax/render/widget_php widgetConfig[code] code injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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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.
9.0$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in vBulletin up to 5.5.4. This issue affects some unknown processing of the file ajax/render/widget_php. Performing a manipulation of the argument widgetConfig[code] as part of Parameter results in input validation. This vulnerability is cataloged as CVE-2019-16759. It is possible to initiate the attack remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability was found in vBulletin up to 5.5.4 (Forum Software). It has been classified as critical. This affects some unknown functionality of the file ajax/render/widget_php. The manipulation of the argument widgetConfig[code] as part of a Parameter leads to a input validation 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 summary by CVE is:

vBulletin 5.x through 5.5.4 allows remote command execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.

The weakness was shared 09/24/2019 as not defined mailinglist post (Full-Disclosure). It is possible to read the advisory at seclists.org. This vulnerability is uniquely identified as CVE-2019-16759 since 09/24/2019. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

A public exploit has been developed in PHP and been published before and not just after the advisory. The exploit is shared for download at exploit-db.com. It is declared as attacked. 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 $0-$5k. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 11/03/2021 with a due date of 05/03/2022:

Apply updates per vendor instructions.

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 vulnerability database at Exploit-DB (47447). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 9.8
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍
Access: Public
Status: Attacked
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/23/2019 🔍
09/24/2019 +1 days 🔍
09/24/2019 +0 days 🔍
09/25/2019 +1 days 🔍
02/05/2025 +1960 days 🔍

Sourcesinfo

Advisory: 154623
Status: Confirmed

CVE: CVE-2019-16759 (🔍)
GCVE (CVE): GCVE-0-2019-16759
GCVE (VulDB): GCVE-100-142179
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/25/2019 07:26
Updated: 02/05/2025 04:34
Changes: 09/25/2019 07:26 (37), 10/08/2019 07:32 (1), 10/08/2019 07:33 (2), 10/08/2019 07:35 (1), 10/08/2019 07:36 (2), 08/29/2020 15:53 (18), 12/27/2023 15:55 (7), 04/20/2024 16:56 (27), 09/09/2024 22:29 (1), 02/05/2025 04:34 (15)
Complete: 🔍
Committer: misc
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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