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GHSA-qjqp-xr96-cj99
No affected components available
The Trix editor, versions prior to 2.1.1, is vulnerable to arbitrary code execution when copying and pasting content from the web or other documents with markup into the editor. The vulnerability stems from improper sanitization of pasted content, allowing an attacker to embed malicious scripts which are executed within the context of the application.
Vulnerable Versions:
- 1.x series up to and including 1.3.1
- 2.x series up to and including 2.1.0
Fixed Versions:
- v1.3.2
- v2.1.1
Vector:
- Bug 1: When copying content manipulated by a script, such as:
document.addEventListener('copy', function(e){
e.clipboardData.setData('text/html', '<div><noscript><div class="123</noscript>456<img src=1 onerror=alert(1)//"></div></noscript></div>');
e.preventDefault();
});
and pasting into the Trix editor, the script within the content is executed.
- Bug 2: Similar execution occurs with content structured as:
document.write(`copy<div data-trix-attachment="{"contentType":"text/html","content":"<img src=1 onerror=alert(101)>HELLO123"}"></div>me`);
Impact:
An attacker could exploit these vulnerabilities to execute arbitrary JavaScript code within the context of the user's session, potentially leading to unauthorized actions being performed or sensitive information being disclosed.
Remediation:
Update Recommendation: Users should upgrade to Trix editor version 2.1.1 or later, which incorporates proper sanitization of input from copied content.
CSP Enhancement: Additionally, enhancing the Content Security Policy (CSP) to disallow inline scripts can significantly mitigate the risk of such vulnerabilities. Set CSP policies such as script-src 'self' to ensure that only scripts hosted on the same origin are executed, and explicitly prohibit inline scripts using script-src-elem.
References:
- https://github.com/basecamp/trix/releases/tag/v2.1.1
- https://github.com/basecamp/trix/pull/1147
- https://github.com/basecamp/trix/pull/1149
- https://github.com/basecamp/trix/pull/1153
Credit: These issues were reported by security researchers loknop and pinpie.
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. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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