Remote object deserialization via geopluginURL
Published Sep 13, 2026 · Updated Sep 13, 2026
Deserialization of untrusted data in Small CRM 4.0 allows remote attackers to trigger object deserialization through the login success handler. The /crm/login.php unserialize function processes the geopluginURL argument without safe validation, causing deserialization when a crafted value reaches the handler. Remote reachability is documented, but the record describes attack complexity as high and does not establish a further impact beyond triggering deserialization.
Summary
What happened
Deserialization of untrusted data in Small CRM 4.0 allows remote attackers to trigger object deserialization through the login success handler. The /crm/login.php unserialize function processes the geopluginURL argument without safe validation, causing deserialization when a crafted value reaches the handler. Remote reachability is documented, but the record describes attack complexity as high and does not establish a further impact beyond triggering deserialization.
The record
- CVE
- CVE-2026-90575
- Published
- Sep 13, 2026
- Updated
- Sep 13, 2026
- Vendor
- jaychouchannel
- Product
- Small CRM
- Classifications
- T1190
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 13, 2026CVE publishedPublication date reported by the CVE source.
- Sep 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=4.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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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