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TI-2026-32587 Aliases CVE-2026-44696

OpenProject: Stored CSS injection via Sanitize::Config::RELAXED[:css] enables phishing overlays and data exfiltration

Priority MEDIUM 59CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00253 16th percentileScored 2026-11-07
Fix Fixed openproject (opf): 17.4.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
opfopenprojectbefore 17.4.017.4.0Patch availableCNA
  • openproject Vendoropf Affected before 17.4.0 Fixed in 17.4.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:openproject:openproject:*:*:*:*:*:*:*:*——opf
  • cpe:2.3:a:openproject:openproject:*:*:*:*:*:*:*:* Versions — — ·opf

Remediation

  • Fix · CNA openproject (opf) Fixed in 17.4.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-44696

References

Other 1

  • TI-2019-08673 A SQL injection vulnerability in the activities API in OpenProject before 8.3.2 allows a… CVSS 3.0HIGH 8.1
  • TI-2026-34781 OpenProject: Journal diff endpoint bypasses object, journal, and field visibility checks CVSS 3.1HIGH 7.5
  • TI-2026-26047 OpenProject: 2FA OTP Verification Missing Rate Limiting CVSS 3.1HIGH 7.4
  • TI-2026-29552 OpenProject has Cross-Project Meeting Agenda Item Injection via Unscoped Section Lookup CVSS 3.1HIGH 7.1
  • TI-2026-32623 OpenProject: Relations API Filter Bypasses Visibility Scope, Leaking Cross-Project Work Package Subjects CVSS 3.1MEDIUM 6.5
  • TI-2023-14850 OpenProject user sessions not terminated after activation of 2FA CVSS 3.1MEDIUM 6.5
See all 57 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences