Discourse < 1.9.0.beta13 Reflected XSS via /email/unsubscribed
Discourse 1.9.0.beta2 before 1.9.0.beta13 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts through the email parameter of /email/unsubscribed. Attackers can craft GET requests with SVG onload payloads, which unsubscribed.html.erb renders unescaped via html_safe, executing JavaScript in victims' browsers. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-19.
CVE-2017-20290
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2017-20290
Discourse
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/discourse/discourse",
"vendor": "Discourse",
"product": "Discourse",
"versions": [
{
"status": "affected",
"version": "1.9.0.beta2",
"lessThan": "1.9.0.beta13",
"versionType": "custom"
}
],
"packageURL": "pkg:github/discourse/discourse",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2017-20290
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #50153 · Revision 1
- Added to Heist Feed
- Publisher date