Unauthenticated administrator registration via incorrect privilege assignment
Published May 23, 2025 · Updated Apr 28, 2026
Incorrect privilege assignment in Pebas CouponXL 4.5.0 and earlier allows remote attackers to register WordPress administrator accounts. Published records do not identify the registration handler or the validation error that assigns the administrator role to an untrusted signup. No authentication or user interaction is required, and successful registration grants full administrative control of the affected site.
Summary
What happened
Incorrect privilege assignment in Pebas CouponXL 4.5.0 and earlier allows remote attackers to register WordPress administrator accounts. Published records do not identify the registration handler or the validation error that assigns the administrator role to an untrusted signup. No authentication or user interaction is required, and successful registration grants full administrative control of the affected site.
The record
- CVE
- CVE-2025-39489
- Published
- May 23, 2025
- Updated
- Apr 28, 2026
- Vendor
- Pebas
- Product
- CouponXL
- Classifications
- CWE-266, CAPEC-233, T1136
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 23, 2025CVE publishedPublication date reported by the CVE source.
- Apr 28, 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 <=4.5.0 changes=[{"at":"4.5.1","status":"unaffected"}]
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.
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Technologies
Your stack
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Your stack
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