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CVE-2024-53266— Cross-site Scripting (XSS) via topic titles when CSP disabled in Discourse

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.

Discourse是Discourse开源的一套开源的社区讨论平台。该平台包括社区、电子邮件和聊天室等功能。 Discourse存在跨站脚本漏洞，该漏洞源于在某些插件组合下且CSP被禁用时，用户个人资料页面中的活动流可能易受到跨站脚本攻击。

CVSS 4.3 · Medium EPSS 0.28% · P20 Updated Feb 05, 2025

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

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I. Basic Information for CVE-2024-53266

Vulnerability Information

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Vulnerability Title

Cross-site Scripting (XSS) via topic titles when CSP disabled in Discourse

Source: CVE Program / CVE List V5

Vulnerability Description

Discourse is an open source platform for community discussion. In affected versions with some combinations of plugins, and with CSP disabled, activity streams in the user's profile page may be vulnerable to XSS. This has been patched in the latest version of Discourse core. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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

Vulnerability Title

Discourse 跨站脚本漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
discourse	discourse	stable: < 3.3.3	-

II. Public POCs for CVE-2024-53266

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2024-53266

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Vendor Advisories for CVE-2024-53266 (1)

XSS via topic titles when CSP disabled · Advisory · discourse/discourse · GitHub x_refsource_CONFIRM

https://www.cve.org/CVERecord?id=CVE-2024-53266

Same Patch Batch · discourse · 2025-02-04 · 9 CVEs total

CVE-2024-55948	8.2 HIGH	Anonymous cache poisoning via XHR requests in Discourse
CVE-2025-23023	8.2 HIGH	Anonymous cache poisoning via request headers in Discourse
CVE-2024-56328	6.5 MEDIUM	HTMLi(XSS without CSP) via Onebox urls in Discourse
CVE-2025-22602	6.5 MEDIUM	Stored DOM-based XSS (without CSP) via video placeholders in Discourse
CVE-2024-53851	4.3 MEDIUM	Partial denial of service via inline oneboxes in Discourse
CVE-2024-53994	4.3 MEDIUM	Potential bypass of chat permissions in Discourse
CVE-2025-22601	3.1 LOW	Client Side Path Traversal using activate account route in Discourse
CVE-2024-56197	2.2 LOW	Users can see other user's tagged PMs in Discourse

IV. Related Vulnerabilities

Same product: discourse

Same vendor: discourse

Same weakness: CWE-79