Cloudanix VulnDB

CVE-2026-52781

Medium · 6.4

CVSS

6.4

EPSS

0.3%

Published

Jun 26, 2026

CISA due date

—

The record

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, the HTML sanitizer grants <macro> elements unrestricted data-* attributes via :data wildcard. An attacker injects data-controller="poll-for-changes" into a work package description, causing Stimulus.js to mount a controller that fetches an attacker-uploaded attachment and passes it to renderStreamMessage(). This executes arbitrary Turbo Stream actions — including redirect_to — in every victim's authenticated browser session, redirecting them to an attacker-controlled server. This vulnerability is fixed in 17.3.3 and 17.4.1.

Affected packages

Ecosystem Package Introduced Fixed

Related vulnerabilities