GetSimpleCMS 3.3.15 admin/upload.php unrestricted upload

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 (≈)
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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.
4.3$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in GetSimpleCMS 3.3.15. This impacts an unknown function of the file admin/upload.php. Performing a manipulation results in unrestricted upload. This vulnerability is cataloged as CVE-2018-19420. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in GetSimpleCMS 3.3.15. It has been classified as critical. This affects some unknown functionality of the file admin/upload.php. The manipulation with an unknown input leads to a unrestricted upload vulnerability. CWE is classifying the issue as CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In GetSimpleCMS 3.3.15, admin/upload.php blocks .html uploads but there are several alternative cases in which HTML can be executed, such as a file with no extension or an unrecognized extension (e.g., the test or test.asdf filename), because of admin/upload-uploadify.php, and validate_safe_file in admin/inc/security_functions.php.

The bug was discovered 11/14/2018. The weakness was shared 11/21/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2018-19420 since 11/21/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. A authentication is required for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:admin/upload.php it is possible to find vulnerable targets with Google Hacking.

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

The entry VDB-127060 is related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.7
VulDB Temp Score: 4.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.8
NVD 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: Unrestricted upload
CWE: CWE-434 / 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: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/14/2018 🔍
11/21/2018 +7 days 🔍
11/21/2018 +0 days 🔍
11/21/2018 +0 days 🔍
11/22/2018 +1 days 🔍
06/11/2023 +1662 days 🔍

Sourcesinfo

Product: github.com

Advisory: 1301
Status: Not defined

CVE: CVE-2018-19420 (🔍)
GCVE (CVE): GCVE-0-2018-19420
GCVE (VulDB): GCVE-100-127059
See also: 🔍

Entryinfo

Created: 11/22/2018 08:06
Updated: 06/11/2023 09:35
Changes: 11/22/2018 08:06 (56), 04/14/2020 14:20 (1), 06/11/2023 09:35 (3)
Complete: 🔍
Cache ID: 216::103

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

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