CVE-2026-33193— Docmost vulnerable to stored XSS via MIME type spoofing
Quick assessment
Affected
docmost docmost
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.
Docmost是Docmost开源的一个开协作维基和文档软件。 Docmost 0.70.0之前版本存在跨站脚本漏洞，该漏洞源于MIME类型欺骗处理不当，可能导致存储型跨站脚本攻击，危及用户和数据安全。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-33193
Vulnerability Information
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Vulnerability Title
Docmost vulnerable to stored XSS via MIME type spoofing
Source: CVE Program / CVE List V5
Vulnerability Description
Docmost is open-source collaborative wiki and documentation software. Versions prior to 0.70.0 are vulnerable to a stored cross-site scripting (XSS) attack due to improper handling of MIME type spoofing (GHSL-2026-052). An attacker could exploit this flaw to inject malicious scripts, potentially compromising the security of users and data. Version 0.70.0 contains a patch.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/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
Vulnerability Title
Docmost 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Docmost是Docmost开源的一个开协作维基和文档软件。 Docmost 0.70.0之前版本存在跨站脚本漏洞，该漏洞源于MIME类型欺骗处理不当，可能导致存储型跨站脚本攻击，危及用户和数据安全。
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
II. Public POCs for CVE-2026-33193
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · docmost · 2026-04-14 · 4 CVEs total
| CVE-2026-34212 | 5.4 MEDIUM | Docmost page content has stored XSS via unsanitized attachment URLs |
| CVE-2026-34213 | 5.4 MEDIUM | Docmost has cross-page attachment overwrite via flawed attachmentId overwrite validation |
| CVE-2026-33146 | 4.3 MEDIUM | Docmost's Public Share Search Exposes Metadata of Restricted Children |
IV. Related Vulnerabilities
Same product: docmost
-
CVE-2026-48073
Docmost: Page export can include restricted same-space attac -
CVE-2026-52853
Docmost: Privilege Escalation - ADMIN Can Invite Users as OW -
CVE-2026-48072
Docmost: Public image fileName path traversal leads to unaut -
CVE-2026-52850
Docmost: Broken access control in transclusion lookup API le -
CVE-2026-65827
Docmost: Unbounded ZIP decompression (zip-bomb) in page impo
Same vendor: docmost
-
CVE-2026-48073
Docmost: Page export can include restricted same-space attac -
CVE-2026-52853
Docmost: Privilege Escalation - ADMIN Can Invite Users as OW -
CVE-2026-48072
Docmost: Public image fileName path traversal leads to unaut -
CVE-2026-52850
Docmost: Broken access control in transclusion lookup API le -
CVE-2026-65827
Docmost: Unbounded ZIP decompression (zip-bomb) in page impo
Same weakness: CWE-79
-
CVE-2026-105679
Ghost: Stored XSS via File Uploads on Local Storage -
CVE-2026-105651
Ghost: Stored XSS via Bookmark Card Images -
CVE-2026-105650
Ghost: Stored XSS via oEmbed Photo Responses -
CVE-2026-105649
Ghost: Stored XSS via SVG Uploads Bypassing Sanitization -
CVE-2026-105644
Ghost: Stored XSS via SVG Files in Content Imports
V. Comments for CVE-2026-33193
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