cve-2017-20290

MEDIUM CVSS 5.1 vulncheck_kev

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.

Timeline

Published: 2026-10-22 00:00 UTC
Last Modified: 2026-10-22

CVSS Details

CVSS details not available.

Affected Products

No product information available.

References

No references available.

Linked Vulnerabilities

No linked vulnerabilities found.

{
  "cvss": 5.1,
  "datePublished": "2026-10-22T00:00:00Z",
  "dateUpdated": "2026-10-22T00:00:00Z",
  "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.",
  "dueDate": "",
  "id": "CVE-2017-20290",
  "kev_catalogs": [
    "vulncheck"
  ],
  "knownRansomwareCampaignUse": "Unknown",
  "product": "Discourse",
  "requiredAction": "Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.",
  "severity": "MEDIUM",
  "source": "vulncheck_kev",
  "title": "discourse discourse Improper Neutralization of Input During Web Page Generation",
  "vendor": "Discourse"
}

cve-2017-20290

Raw JSON Data