CVE-2017-20290
6.1 MEDIUMpublic exploit availablePublished 2026-10-22 · Updated 2026-10-22
AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.
NVD 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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weaknesses
CWE-79
Public exploit & PoC references
All references
- https://github.com/discourse/discourse/commit/6e37f09b19
- https://github.com/discourse/discourse/commit/a6f2533d38
- 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
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
Related CVEs
- MEDIUMCVE-2012-20003PoC
- MEDIUMCVE-2012-20004PoC
- MEDIUMCVE-2012-20005PoC
- MEDIUMCVE-2014-125131PoC
- MEDIUMCVE-2014-125132PoC
- MEDIUMCVE-2016-20098PoC
- MEDIUMCVE-2016-20102PoC
- MEDIUMCVE-2017-20288PoC
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