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CVE-2026-30235— Business Logic Error on OpenProject through hyperlinks in markdown using DOM clobbering

Quick assessment

Affected
opf openproject
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.

OpenProject是OpenProject开源的一个基于Web的项目管理软件。 OpenProject 17.2.0之前版本存在跨站脚本漏洞，该漏洞源于OpenProject的Markdown渲染验证不当，特别是在超链接处理中，可能导致攻击者注入执行DOM破坏的恶意超链接有效载荷，从而崩溃或清空整个页面。

CVSS 6.5 · Medium EPSS 0.56% · P45
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I. Basic Information for CVE-2026-30235

Vulnerability Information
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Vulnerability Title
Business Logic Error on OpenProject through hyperlinks in markdown using DOM clobbering
Source: CVE Program / CVE List V5
Vulnerability Description
OpenProject is an open-source, web-based project management software. Prior to 17.2.0, this vulnerability occurs due to improper validation of OpenProject’s Markdown rendering, specifically in the hyperlink handling. This allows an attacker to inject malicious hyperlink payloads that perform DOM clobbering. DOM clobbering can crash or blank the entire page by overwriting native DOM functions with HTML elements, causing critical JavaScript calls to throw runtime errors during application initialization and halt further execution. This vulnerability is fixed in 17.2.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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
OpenProject 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenProject是OpenProject开源的一个基于Web的项目管理软件。 OpenProject 17.2.0之前版本存在跨站脚本漏洞，该漏洞源于OpenProject的Markdown渲染验证不当，特别是在超链接处理中，可能导致攻击者注入执行DOM破坏的恶意超链接有效载荷，从而崩溃或清空整个页面。
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
opf openproject < 17.2.0 -

II. Public POCs for CVE-2026-30235

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III. Intelligence Information for CVE-2026-30235

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Vendor Advisories for CVE-2026-30235 (1)

Same Patch Batch · opf · 2026-03-11 · 5 CVEs total

CVE-2026-30234 6.5 MEDIUM OpenProject BIM BCF XML Import: <Snapshot> Path Traversal Leads to Arbitrary Local File Re
CVE-2026-30239 6.5 MEDIUM OpenProject has a Permission Check bypass on Budget deletion allows reassignment of WorkPa
CVE-2026-30236 4.3 MEDIUM OpenProject users that are not project members can be used to calculate Labor Budget, leak
CVE-2026-31974 3.0 LOW Blind SSRF on OpenProject instance via webhooks

IV. Related Vulnerabilities

Same product: openproject
Same vendor: opf
Same weakness: CWE-79

V. Comments for CVE-2026-30235

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