MEDIUMCVSS v3.1 6.1Vulnerability
CVE-2017-20290
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.
Properties
- Severity
- MEDIUM
- Nvd fetched at
- 2026-10-22T22:14:18.200859+00:00
- Cvss severity
- MEDIUM
- Cvss score
- 6.1
- Retrieved at
- 2026-10-22T22:16:40+00:00
- Score
- 6.1
- Cvss version
- 3.1
- Last source
- NVD
- Cve id
- CVE-2017-20290
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- First seen by Signal
- 2026-10-22T14:08:40+00:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Published at
- 2026-10-22T11:17:03.220
- Last modified
- 2026-10-22T11:17:03.360
Related Entities (1)
HAS_WEAKNESS (1)
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