HeyForm Vulnerable to Stored XSS via Unauthenticated SVG File Upload
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| heyform | heyform | affected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Heyform | Heyform |
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No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.570% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Heyform
Heyform heyform |
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| Vendors & Products |
Heyform
Heyform heyform |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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| Type | Values Removed | Values Added |
|---|---|---|
| Description | HeyForm is an open-source form builder. Prior to version 3.0.0-rc.7, the `/api/upload` endpoint allows unauthenticated file uploads including SVG files. Uploaded SVGs are stored in the static assets directory and served with `Content-Type: image/svg+xml` by Express's serve-static middleware, allowing an attacker to achieve stored cross-site scripting (XSS) on the heyform domain without any authentication. Version 3.0.0-rc.7 contains a patch for the issue. | |
| Title | HeyForm Vulnerable to Stored XSS via Unauthenticated SVG File Upload | |
| Weaknesses | CWE-434 CWE-79 |
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| References |
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| Metrics |
cvssV4_0
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