Discourse has XSS when editing a malicious post
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| discourse | discourse | affected |
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Configuration 1 [-]
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No data.
| Vendor | Product | Versions | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Discourse | Discourse |
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No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.178% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:* cpe:2.3:a:discourse:discourse:2026.2.0:*:*:*:latest:*:*:* |
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| Metrics |
cvssV3_1
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| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Discourse
Discourse discourse |
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| Vendors & Products |
Discourse
Discourse discourse |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, a user full name can be evaluated as raw HTML when the following settings are set: `display_name_on_posts` => true; and `prioritize_username_in_ux` => false. Editing a post of a malicious user would trigger an XSS. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available. | |
| Title | Discourse has XSS when editing a malicious post | |
| Weaknesses | CWE-79 | |
| References |
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| Metrics |
cvssV4_0
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