CVE-2026-44696 — OpenProject: Stored CSS injection via Sanitize::Config::RELAXED[:css] enables phishing overlays and data exfiltration
OpenProject is open-source, web-based project management software. Prior to 17.4.0, OpenProject's rich text (markdown) rendering pipeline uses Sanitize::Config::RELAXED[:css] fo…
Published: 2026-06-26 · CVSS: 5.7 · CVSS 3.1
OpenProject is open-source, web-based project management software. Prior to 17.4.0, OpenProject's rich text (markdown) rendering pipeline uses Sanitize::Config::RELAXED[:css] for inline style sanitization. This configuration permits essentially all CSS properties in style attributes on permitted HTML elements (figure, img, table, th, tr, td). This allows any authenticated user with write access to formattable text fields (work package descriptions, comments, project descriptions, news) to inject CSS This vulnerability is fixed in 17.4.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7