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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-73320— XenForo < 2.3.13 Unauthenticated Information Disclosure via Unfurl Endpoint

Quick assessment

Affected
XenForo XenForo
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.

XenForo 2.3.13 之前的版本存在一个未认证的信息泄露漏洞，允许未认证的攻击者通过向 unfurl 端点提供可预测的自增主键 ID，从而获取私有 unfurl 记录。攻击者可以枚举或预测结果 ID，并无需任何会话、用户或可见性检查即可查询该端点，从而从私密对话和其他受限制的内容中获取渲染后的预览 HTML、原始 URL 以及查询字符串。

CVSS 6.1 · Medium

Possible ATT&CK Techniques 1 AI

T1019

Affected Version Matrix 1

VendorProduct Version RangeStatus
XenForo XenForo < 2.3.13 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-73320

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
XenForo < 2.3.13 Unauthenticated Information Disclosure via Unfurl Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
XenForo before 2.3.13 contains an unauthenticated information disclosure vulnerability that allows unauthenticated attackers to retrieve private unfurl records by supplying predictable auto-increment primary key IDs to the unfurl endpoint. Attackers can enumerate or predict result IDs and query the endpoint without any session, user, or visibility checks to obtain rendered preview HTML, original URLs, and query strings from private conversations and other restricted content.
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
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
XenForo XenForo 0 ~ 2.3.13 -

II. Public POCs for CVE-2026-73320

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-73320

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-73320 (1)

Exploits & Public PoCs for CVE-2026-73320 (1)

Security Blog Posts for CVE-2026-73320 (1)

Same Patch Batch · XenForo · 2026-09-08 · 14 CVEs total

CVE-2026-73315 8.6 HIGH XenForo < 2.3.13 SSRF via PayPal REST Webhook Handler
CVE-2026-73314 7.5 HIGH XenForo < 2.3.13 Signature Verification Bypass via PayPal REST Webhook
CVE-2026-73316 7.5 HIGH XenForo < 2.3.13 Payment Replay via PayPal REST Payment Provider
CVE-2026-73311 7.4 HIGH XenForo < 2.3.13 OAuth2 Authorization Code Reuse
CVE-2026-73309 7.4 HIGH XenForo < 2.3.13 Authentication Bypass via OAuth2 Token Endpoint
CVE-2026-73312 7.4 HIGH XenForo < 2.3.13 Refresh Token Replay via Expired Access Token
CVE-2026-74239 7.2 HIGH XenForo < 2.3.13 Path Traversal via Style Archive Importer on Windows
CVE-2026-73313 6.8 MEDIUM XenForo < 2.3.13 MFA Bypass via Passkey TFA Provider
CVE-2026-73321 6.5 MEDIUM XenForo < 2.3.13 Uncontrolled Recursion DoS via BBCode Parser
CVE-2026-73319 6.1 MEDIUM XenForo < 2.3.13 XSS via Dynamic Redirect Handler
CVE-2026-73310 5.9 MEDIUM XenForo < 2.3.13 OAuth2 Authorization Code Token Theft via redirect_uri Bypass
CVE-2026-73318 3.8 LOW XenForo < 2.3.13 Missing Authorization via force-agreement Controller
CVE-2026-73317 2.7 LOW XenForo < 2.3.13 Missing Authorization via ACP Cache-Rebuild Dispatcher

IV. Related Vulnerabilities

Same product: XenForo
Same vendor: XenForo
Same weakness: CWE-639

V. Comments for CVE-2026-73320

No comments yet

Leave a comment