Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2017-20290— Discourse < 1.9.0.beta13 Reflected XSS via /email/unsubscribed

Quick assessment

Affected
Discourse Discourse
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Discourse 1.9.0.beta2 至 1.9.0.beta13 版本中，存在一个反射型跨站脚本（XSS）漏洞。该漏洞允许未认证的攻击者通过 接口的 参数注入恶意脚本。攻击者可构造包含 SVG 载荷的 GET 请求，而 模板会通过 方法未转义地渲染该参数，导致受害者的浏览器执行恶意 JavaScript 代码。Shadowserver 基金会于 2023 年 10 月 19 日首次观察到该漏洞的利用证据。

CVSS 6.1 · Medium
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2017-20290

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Discourse < 1.9.0.beta13 Reflected XSS via /email/unsubscribed
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse 1.9.0.beta2 before 1.9.0.beta13 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts through the email parameter of /email/unsubscribed. Attackers can craft GET requests with SVG onload payloads, which unsubscribed.html.erb renders unescaped via html_safe, executing JavaScript in victims' browsers. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-19.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Discourse Discourse 1.9.0.beta2 ~ 1.9.0.beta13 -

II. Public POCs for CVE-2017-20290

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2017-20290

请登录查看更多情报信息。

Other References for CVE-2017-20290 (4)

IV. Related Vulnerabilities

Same product: Discourse
Same vendor: Discourse
Same weakness: CWE-79

V. Comments for CVE-2017-20290

No comments yet

Leave a comment