Umbraco CMS before 17.7.2 and 18.2.2 Account Takeover via Host Header Poisoning
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 17.7.2, 18.2.2
- 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
Umbraco CMS, a content management system used to build and manage websites, is affected by this vulnerability. An unauthenticated attacker could exploit it to take over accounts and gain control of back-office sessions, potentially running malicious code on the server.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Umbraco CMS before 17.7.2 and 18.2.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to register attacker-controlled OAuth redirect URIs by poisoning the Host header. Attackers send signed-in users authorization links using response_mode=form_post to capture codes, then redeem them via HTTP Basic client credentials to hijack back-office sessions and execute code through Razor templates.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- umbraco Umbraco-CMS
fixed in 17.7.2; From 18.0.0 · fixed in 18.2.2