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GHSA-hj8m-9fhf-v7jp
No affected components available
Server-Side Template Injection
Overview of the Vulnerability
Server-Side Template Injection (SSTI) is a vulnerability within application templating engines where user input is improperly handled and is embedded into the template, possibly leading code being executed.
An attacker can use SSTI to execute code on the underlying system by manipulating values within the embedded template. When code is executed within the underlying system, it can allow an attacker to run permissioned commands under the exploited process, or exploit Cross-Site Scripting (XSS) to run code within the user's browser.
Business Impact
SSTI can lead to reputational damage for the business due to a loss in confidence and trust by users. If an attacker successfully executes code within the underlying system, it can result in data theft and indirect financial losses.
Steps to Reproduce
- Sign up and login to your account
- Use a browser to navigate to: email-templates {{URL}}
- put your payload in Edit Base template
{{ cycler.__init__.__globals__.os.popen('id').read() }}and you will se it will execute.
Payload:
{{ cycler.__init__.__globals__.os.popen('id').read() }}
Proof of Concept (PoC)
The screenshot(s) below demonstrates the SSTI:
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Active exploitation in the wild has been confirmed. Immediate patching or mitigation is required.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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