Persistent admin-page denial of service via unsafe unserialization
Published May 13, 2026 · Updated May 13, 2026
PHP object injection in Dev4Press coreActivity 3.0 and earlier allows remote attackers to persistently disrupt the administrative Logs page. query_metas() applies maybe_unserialize() to every stored meta_value, including serialization syntax accepted unchanged from the User-Agent header. Any unauthenticated request that creates a logged event can plant the payload, but the fatal type error is triggered only when an administrator opens the Logs page.
Summary
What happened
PHP object injection in Dev4Press coreActivity 3.0 and earlier allows remote attackers to persistently disrupt the administrative Logs page. query_metas() applies maybe_unserialize() to every stored meta_value, including serialization syntax accepted unchanged from the User-Agent header. Any unauthenticated request that creates a logged event can plant the payload, but the fatal type error is triggered only when an administrator opens the Logs page.
The record
- CVE
- CVE-2026-7635
- Published
- May 13, 2026
- Updated
- May 13, 2026
- Vendor
- Dev4Press
- Product
- coreActivity: Activity Logging for WordPress
- Classifications
- CWE-502, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 13, 2026CVE publishedPublication date reported by the CVE source.
- May 13, 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?
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- Affected versionversion=0 <=3.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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