CVE-2017-20290
CVE-2017-20290 · Discourse < 1.9.0.beta13 Reflected XSS via /email/unsubscribed
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 5.1 · Medium · EPSS 0.3% · Fix available
- Published
- Updated
Affected products and versions
discourse
- Versions
- ≥ 1.9.0.beta2, < 1.9.0.beta13: Affected (custom)
Update to 1.9.0.beta13
Original sources
- https://github.com/discourse/discourse/commit/a6f2533d38
- https://github.com/discourse/discourse/commit/6e37f09b19
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/other/discourse-xss.yaml
- https://www.vulncheck.com/advisories/discourse-1.9.0-beta13-reflected-xss-via-email-unsubscribed
- https://nvd.nist.gov/vuln/detail/CVE-2017-20290