Unauthenticated object injection via unsafe deserialization
Published Aug 18, 2026 · Updated Aug 18, 2026
PHP object injection in Ultimate Maps by Supsystic before 1.5.0 allows remote attackers to instantiate crafted PHP objects via unspecified vectors. Public records attribute the flaw to unsafe deserialization, but the CNA record, NVD entry, and WordPress changelog do not identify the vulnerable function, parameter, or endpoint that unserializes attacker-controlled input. The path is rated network-reachable with no authentication or user interaction, and successful exploitation depends on a usable gadget chain in the WordPress plugin stack because the published records do not disclose a concrete code-execution sink.
Summary
What happened
PHP object injection in Ultimate Maps by Supsystic before 1.5.0 allows remote attackers to instantiate crafted PHP objects via unspecified vectors. Public records attribute the flaw to unsafe deserialization, but the CNA record, NVD entry, and WordPress changelog do not identify the vulnerable function, parameter, or endpoint that unserializes attacker-controlled input. The path is rated network-reachable with no authentication or user interaction, and successful exploitation depends on a usable gadget chain in the WordPress plugin stack because the published records do not disclose a concrete code-execution sink.
The record
- CVE
- CVE-2026-73376
- Published
- Aug 18, 2026
- Updated
- Aug 18, 2026
- Vendor
- Supsystic
- Product
- Ultimate Maps by Supsystic
- Classifications
- CWE-502, CAPEC-586, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 18, 2026CVE publishedPublication date reported by the CVE source.
- Aug 18, 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=n/a <1.5.0 changes=[{"at":"1.5.0","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.
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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