Unauthorized state changes via omitted Referer header
Published Mar 11, 2025 · Updated Mar 12, 2025
Cross-site request forgery in OBiBa Opal before 5.1.1 allows remote attackers to modify data through a victim's authenticated browser. The application-wide request filter accepts state-changing form submissions when the Referer header is absent, so a malicious page can suppress that header and reuse the victim's session cookie. A victim must have an active Opal session and load attacker-controlled content; the demonstrated request grants a user project-administrator permission.
Summary
What happened
Cross-site request forgery in OBiBa Opal before 5.1.1 allows remote attackers to modify data through a victim's authenticated browser. The application-wide request filter accepts state-changing form submissions when the Referer header is absent, so a malicious page can suppress that header and reuse the victim's session cookie. A victim must have an active Opal session and load attacker-controlled content; the demonstrated request grants a user project-administrator permission.
The record
- CVE
- CVE-2025-27792
- Published
- Mar 11, 2025
- Updated
- Mar 12, 2025
- Vendor
- OBiBa
- Product
- Opal
- Classifications
- CWE-352, T1098
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 11, 2025CVE publishedPublication date reported by the CVE source.
- Mar 12, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 5.1.1
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.
Public exploit references
- Opal CSRF Referer-suppression proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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