GetSimple CMS up to 3.3.15 theme-edit.php credentials management

HistoryDiffrelatejsonxmlCTI

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.
7.7	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in GetSimple CMS up to 3.3.15. The impacted element is an unknown function of the file theme-edit.php. Such manipulation leads to credentials management. This vulnerability is uniquely identified as CVE-2019-11231. The attack can be launched remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability, which was classified as critical, has been found in GetSimple CMS up to 3.3.15 (Content Management System). Affected by this issue is an unknown part of the file theme-edit.php. The manipulation with an unknown input leads to a credentials management vulnerability. Using CWE to declare the problem leads to CWE-255. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in GetSimple CMS through 3.3.15. insufficient input sanitation in the theme-edit.php file allows upload of files with arbitrary content (PHP code, for example). This vulnerability is triggered by an authenticated user; however, authentication can be bypassed. According to the official documentation for installation step 10, an admin is required to upload all the files, including the .htaccess files, and run a health check. However, what is overlooked is that the Apache HTTP Server by default no longer enables the AllowOverride directive, leading to data/users/admin.xml password exposure. The passwords are hashed but this can be bypassed by starting with the data/other/authorization.xml API key. This allows one to target the session state, since they decided to roll their own implementation. The cookie_name is crafted information that can be leaked from the frontend (site name and version). If a someone leaks the API key and the admin username, then they can bypass authentication. To do so, they need to supply a cookie based on an SHA-1 computation of this known information. The vulnerability exists in the admin/theme-edit.php file. This file checks for forms submissions via POST requests, and for the csrf nonce. If the nonce sent is correct, then the file provided by the user is uploaded. There is a path traversal allowing write access outside the jailed themes directory root. Exploiting the traversal is not necessary because the .htaccess file is ignored. A contributing factor is that there isn't another check on the extension before saving the file, with the assumption that the parameter content is safe. This allows the creation of web accessible and executable files with arbitrary content.

The bug was discovered 05/16/2019. The weakness was disclosed 05/22/2019. This vulnerability is handled as CVE-2019-11231 since 04/14/2019. The attack may be launched remotely. A simple authentication is necessary for exploitation. Technical details as well as a public exploit are known. This vulnerability is assigned to T1552 by the MITRE ATT&CK project.

A public exploit has been developed by truerand0m in Ruby/Metasploit and been published even before and not after the advisory. The exploit is available at github.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 24 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:theme-edit.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 vulnerability is also documented in the vulnerability database at Exploit-DB (46880). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Content Management System

Vendor

GetSimple

Name

Version

License

free

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
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: Credentials management
CWE: CWE-255
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Author: truerand0m
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

MetaSploit ID: exploit/multi/http/getsimplecms_unauth_code_exec
MetaSploit Name: GetSimpleCMS Unauthenticated RCE

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/14/2019 🔍
04/28/2019 +13 days 🔍
05/16/2019 +18 days 🔍
05/22/2019 +6 days 🔍
05/23/2019 +1 days 🔍
08/04/2025 +2265 days 🔍

Sourcesinfo

Advisory: 152961
Status: Not defined

CVE: CVE-2019-11231 (🔍)
GCVE (CVE): GCVE-0-2019-11231
GCVE (VulDB): GCVE-100-135362
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/23/2019 12:14
Updated: 08/04/2025 04:36
Changes: 05/23/2019 12:14 (55), 06/14/2020 16:26 (1), 09/23/2023 15:45 (4), 08/25/2024 11:45 (5), 08/25/2024 11:46 (3), 08/25/2024 11:49 (17), 08/04/2025 04:36 (10)
Complete: 🔍
Committer: misc
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.