Administrator account takeover via mismatched social-login identity
Published Aug 23, 2025 · Updated Apr 8, 2026
Authentication bypass in Case Theme User 1.0.3 and earlier allows remote attackers to access administrator accounts via social login. In facebook_ajax_login_callback(), the code authenticates a predictable temporary username, then uses the request-supplied email to issue a different user's cookie. Exploitation requires an existing temporary account and the target administrator's email; success grants full access to that account.
Summary
What happened
Authentication bypass in Case Theme User 1.0.3 and earlier allows remote attackers to access administrator accounts via social login. In facebook_ajax_login_callback(), the code authenticates a predictable temporary username, then uses the request-supplied email to issue a different user's cookie. Exploitation requires an existing temporary account and the target administrator's email; success grants full access to that account.
The record
- CVE
- CVE-2025-5821
- Published
- Aug 23, 2025
- Updated
- Apr 8, 2026
- Vendor
- Case-Themes
- Product
- Case Theme User
- Classifications
- CWE-288, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 23, 2025Exploitation reportedWordfence observed exploitation of Case Theme User social login
- Aug 23, 2025CVE publishedPublication date reported by the CVE source.
- Apr 8, 2026Record 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=0 <=1.0.3
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
- Wordfence social-login exploit request sequencefunctional · observed in use
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- Wordfence observed exploitation of Case Theme User social loginreported exploitation
Technologies
Your stack
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Your stack
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