BookStack before 26.05.4 contains a stored cross-site scripting vulnerability in the drawing upload endpoint that accepts unvalidated base64 content and stores it without content inspection. Attackers with editor permissions can upload SVG files containing scripts that execute in administrator browsers when accessed through the image gallery API without content-type validation or CSP headers.
Metrics
Affected Vendors & Products
References
History
Wed, 02 Sep 2026 16:30:00 +0000
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| Metrics |
ssvc
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Wed, 02 Sep 2026 01:15:00 +0000
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| Description | BookStack before 26.05.4 contains a stored cross-site scripting vulnerability in the drawing upload endpoint that accepts unvalidated base64 content and stores it without content inspection. Attackers with editor permissions can upload SVG files containing scripts that execute in administrator browsers when accessed through the image gallery API without content-type validation or CSP headers. | |
| Title | BookStack before 26.05.4 Stored XSS via Drawing Upload | |
| First Time appeared |
Bookstackapp
Bookstackapp bookstack |
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| Weaknesses | CWE-79 | |
| CPEs | cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Bookstackapp
Bookstackapp bookstack |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-09-02T16:01:37.536Z
Reserved: 2026-09-01T23:24:15.911Z
Link: CVE-2026-84695
Updated: 2026-09-02T13:42:26.907Z
Status : Received
Published: 2026-09-02T01:17:24.400
Modified: 2026-09-02T16:17:32.440
Link: CVE-2026-84695
No data.
OpenCVE Enrichment
Updated: 2026-09-02T04:30:04Z