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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-18526— HumHub 1.18.4 / 1.18.4-pl1 – Stored Cross-Site Scripting in oEmbed confirmation

Quick assessment

Affected
HumHub HumHub
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.

HumHub是HumHub组织开源的一个企业社交网络协作平台。 HumHub 1.18.4版本和1.18.4-pl1版本存在跨站脚本漏洞，该漏洞源于oEmbed确认渲染工作流存在存储型跨站脚本漏洞。

CVSS 7.4 · High EPSS 0.34% · P27

Affected Version Matrix 1

VendorProduct Version RangeStatus
HumHub HumHub 1.18.4 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-18526

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
HumHub 1.18.4 / 1.18.4-pl1 – Stored Cross-Site Scripting in oEmbed confirmation
Source: CVE Program / CVE List V5
Vulnerability Description
HumHub Community Edition 1.18.4 and 1.18.4-pl1 contain a stored Cross-Site Scripting (XSS) vulnerability in the oEmbed confirmation rendering workflow.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA: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
HumHub 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HumHub是HumHub组织开源的一个企业社交网络协作平台。 HumHub 1.18.4版本和1.18.4-pl1版本存在跨站脚本漏洞，该漏洞源于oEmbed确认渲染工作流存在存储型跨站脚本漏洞。
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
HumHub HumHub 1.18.4 -

II. Public POCs for CVE-2026-18526

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-18526

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-18526 (1)

Vendor Advisories for CVE-2026-18526 (1)

Vendor Pages for CVE-2026-18526 (1)

Same Patch Batch · HumHub · 2026-08-19 · 3 CVEs total

CVE-2026-18756 7.2 HIGH HumHub Community Edition 1.18.4-pl1 - Reflected XSS in Space membership request button ren
CVE-2026-18430 7.2 HIGH HumHub 1.18.4 - Stored XSS in comment-deletion notifications through unescaped administrat

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-18526

No comments yet

Leave a comment