Credential disclosure via unsafe redirect forwarding
Published Sep 15, 2022 · Updated Apr 23, 2025
Information exposure in Nextcloud Server before 23.0.7 and 24.0.0 through 24.0.2 allows remote authenticated users to disclose Authorization headers. The bundled Guzzle 7.4.0 redirect middleware checks for a host change but fails to remove the header when a request is downgraded from HTTPS to HTTP. Exploitation requires an authenticated request and a followed downgrade redirect, exposing the credential to the cleartext destination or a network observer.
Summary
What happened
Information exposure in Nextcloud Server before 23.0.7 and 24.0.0 through 24.0.2 allows remote authenticated users to disclose Authorization headers. The bundled Guzzle 7.4.0 redirect middleware checks for a host change but fails to remove the header when a request is downgraded from HTTPS to HTTP. Exploitation requires an authenticated request and a followed downgrade redirect, exposing the credential to the cleartext destination or a network observer.
The record
- CVE
- CVE-2022-36074
- Published
- Sep 15, 2022
- Updated
- Apr 23, 2025
- Vendor
- Nextcloud GmbH
- Product
- Security Advisories
- Classifications
- CWE-863, CWE-200, CWE-215, T1557
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 15, 2022CVE publishedPublication date reported by the CVE source.
- Apr 23, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 23.0.7
- Affected versionversion=>= 24.0.0, < 24.0.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo