Strapi versions 4.x through 4.26.2 and 5.x before 5.48.1 contain a stored cross-site scripting vulnerability in the content manager WYSIWYG preview… (CVE-2026-90561)
Strapi versions 4.x through 4.26.2 and 5.x before 5.48.1 contain a stored cross-site scripting vulnerability in the content manager WYSIWYG preview component that fails to strip script tags from rich text. An Author-role user can store malicious script tags in rich text fields that execute in an Editor or Super Admin's session when the preview pane is expanded, enabling account takeover.
AI Analysis
Technical Summary
Strapi versions 4.x through 4.26.2 and 5.x before 5.48.1 contain a stored cross-site scripting vulnerability in the content manager WYSIWYG preview component. The component fails to properly sanitize script tags in rich text fields. An attacker with Author role privileges can store malicious scripts that execute in higher-privileged users' sessions (Editor or Super Admin) when they view the preview pane, potentially enabling account takeover.
Potential Impact
Successful exploitation allows an attacker with Author role to execute arbitrary scripts in the context of Editor or Super Admin users, leading to potential account takeover. The vulnerability affects confidentiality and integrity with high impact, but does not affect availability. The CVSS score is 8.7 (critical).
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is applied, restrict Author role privileges or avoid expanding the WYSIWYG preview pane for untrusted content. Monitor vendor communications for official fixes.
Strapi versions 4.x through 4.26.2 and 5.x before 5.48.1 contain a stored cross-site scripting vulnerability in the content manager WYSIWYG preview… (CVE-2026-90561)
Description
Strapi versions 4.x through 4.26.2 and 5.x before 5.48.1 contain a stored cross-site scripting vulnerability in the content manager WYSIWYG preview component that fails to strip script tags from rich text. An Author-role user can store malicious script tags in rich text fields that execute in an Editor or Super Admin's session when the preview pane is expanded, enabling account takeover.
CVSS v3.1
Score 8.7high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Strapi versions 4.x through 4.26.2 and 5.x before 5.48.1 contain a stored cross-site scripting vulnerability in the content manager WYSIWYG preview component. The component fails to properly sanitize script tags in rich text fields. An attacker with Author role privileges can store malicious scripts that execute in higher-privileged users' sessions (Editor or Super Admin) when they view the preview pane, potentially enabling account takeover.
Potential Impact
Successful exploitation allows an attacker with Author role to execute arbitrary scripts in the context of Editor or Super Admin users, leading to potential account takeover. The vulnerability affects confidentiality and integrity with high impact, but does not affect availability. The CVSS score is 8.7 (critical).
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is applied, restrict Author role privileges or avoid expanding the WYSIWYG preview pane for untrusted content. Monitor vendor communications for official fixes.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-jh7v-p6jw-jwhc
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-90561"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6aa741a355bf5e2cf5489be0
Added to database: 09/14/2026, 00:36:51 UTC
Last enriched: 09/14/2026, 00:42:13 UTC
Last updated: 09/14/2026, 03:09:15 UTC
Views: 5
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