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TI-2026-56813 Aliases CVE-2026-82396GHSA-pp4x-ccxq-6r33

Sulu: Stored XSS via media download inline-disposition override

Priority LOW 24CWE-79Published · Updated

Key facts

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

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

Summary

Sulu is an open-source PHP content management system based on the Symfony framework. Prior to versions 2.6.25 and 3.0.8, src/Sulu/Bundle/MediaBundle/Controller/MediaStreamController.php allows the /media/{id}/download/{slug} route and its administration variant to honor the inline query parameter for scriptable MIME types. The vulnerable stored Content-Type values include text/html, application/xhtml+xml, text/xml, and application/xml. An attacker with media upload permission can store an HTML, XHTML, or XML document and create a link using inline=1, causing the application to return the file on the Sulu origin instead of forcing Content-Disposition attachment. When an authenticated victim opens the link, attacker-controlled JavaScript can execute with the victim's Sulu-origin session and can read data or perform actions as that victim. This issue is fixed in versions 2.6.25 and 3.0.8.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00298 22nd percentileScored 2026-11-07
Fix Fixed sulu (sulu): 2.6.25, 3.0.8sulu/sulu (Packagist): 2.6.25, 3.0.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
sulusulubefore 2.6.25; 3.0.0-alpha1 to before 3.0.82.6.25, 3.0.8Patch availableCNA
—sulu/sulu (Packagist)before 2.6.252.6.25Patch availableGHSA-pp4x-ccxq-6r33
—sulu/sulu (Packagist)3.0.0-alpha1 to before 3.0.83.0.8Patch availableGHSA-pp4x-ccxq-6r33
  • sulu Vendorsulu Affected before 2.6.25; 3.0.0-alpha1 to before 3.0.8 Fixed in 2.6.25, 3.0.8 Patch available CNA
  • sulu/sulu (Packagist) Vendor— Affected before 2.6.25 Fixed in 2.6.25 Patch available GHSA-pp4x-ccxq-6r33
  • sulu/sulu (Packagist) Vendor— Affected 3.0.0-alpha1 to before 3.0.8 Fixed in 3.0.8 Patch available GHSA-pp4x-ccxq-6r33

CPE names Threatist (inferred) · 1

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

CPEVersionsRoleVendor
cpe:2.3:a:sulu:sulu:*:*:*:*:*:*:*:*——sulu
  • cpe:2.3:a:sulu:sulu:*:*:*:*:*:*:*:* Versions — — ·sulu

Remediation

  • Fix · CNA sulu (sulu) Fixed in 2.6.25, 3.0.8
  • Fix · GHSA-pp4x-ccxq-6r33 sulu/sulu (Packagist) Fixed in 2.6.25 Advisory →
  • Fix · GHSA-pp4x-ccxq-6r33 sulu/sulu (Packagist) Fixed in 3.0.8 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82396
  2. 2026-10-03 Alias added: GHSA-pp4x-ccxq-6r33

References

Advisory 1

Other 5

  • TI-2021-19642 PHP file inclusion in the Sulu admin panel CVSS 3.1HIGH 8.8
  • TI-2024-18520 Sulu grants access to pages regardless of role permissions CVSS 3.1HIGH 8.1
  • TI-2021-12405 XSS Injection in Media Collection Title was possible CVSS 3.1HIGH 8.4
  • TI-2026-33442 Sulu: Weak Cryptographical usage for API Key generation and Reset Tokens CVSS 4.0MEDIUM 6.9
  • TI-2025-30243 Sulu vulnerable to XXE in SVG File upload Inspector CVSS 4.0MEDIUM 6.1
  • TI-2021-19641 Privilege escalation in the Sulu Admin panel CVSS 3.1HIGH 7.2
See all 18 →

Sources

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