Discourse < 1.9.0.beta13 Reflected XSS via /email/unsubscribed
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.9.0.beta13
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Discourse, an open-source discussion forum platform, is affected through its email unsubscribe page. An unauthenticated attacker could use a crafted link to run malicious scripts in a victim's browser, potentially compromising the victim's session or data.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original 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
- CVE published
- First seen by cve.now
Affected versions
- Discourse Discourse
From 1.9.0.beta2 · fixed in 1.9.0.beta13