Stored XSS via missing SVG script restrictions
Published Aug 31, 2026 · Updated Aug 31, 2026
Stored cross-site scripting in pretix GmbH Venueless before 7dff888 allows remote authenticated users to execute JavaScript through uploaded SVG files. The default Docker image's web server delivers attacker-supplied SVG content without a Content Security Policy that blocks embedded scripts. Exploitation requires low-privileged upload access and passive interaction by another user; the code runs in that user's browser origin and can read or alter accessible event data.
Summary
What happened
Stored cross-site scripting in pretix GmbH Venueless before 7dff888 allows remote authenticated users to execute JavaScript through uploaded SVG files. The default Docker image's web server delivers attacker-supplied SVG content without a Content Security Policy that blocks embedded scripts. Exploitation requires low-privileged upload access and passive interaction by another user; the code runs in that user's browser origin and can read or alter accessible event data.
The record
- CVE
- CVE-2026-82838
- Published
- Aug 31, 2026
- Updated
- Aug 31, 2026
- Vendor
- pretix GmbH
- Product
- Venueless
- Classifications
- CWE-80, T1189
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 31, 2026CVE publishedPublication date reported by the CVE source.
- Aug 31, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <7dff888
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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