Vulnerability Description
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 Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/discourse/discourse/commit/6e37f09b19
- https://github.com/discourse/discourse/commit/a6f2533d38
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilit
- https://www.vulncheck.com/advisories/discourse-1.9.0-beta13-reflected-xss-via-em
FAQ
What is CVE-2017-20290?
CVE-2017-20290 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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/unsubscr...
How severe is CVE-2017-20290?
CVE-2017-20290 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-20290?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.