EUVD-2026-57947
GHSA-p43p-3gc5-7925
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated remote request reaches unserialize() with no interaction (AV:N/AC:L/PR:N/UI:N); object injection to RCE yields full C:H/I:H/A:H, though realized impact hinges on gadget availability.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Unauthenticated PHP Object Injection in Headless Single Sign On <= 1.6 versions.
Articles & Coverage 1
AnalysisAI
Unauthenticated PHP object injection in the miniOrange Headless Single Sign On WordPress plugin (versions 1.6 and earlier) lets remote attackers pass attacker-controlled serialized data into a PHP unserialize() call, enabling property-oriented programming (POP) gadget chains that can lead to remote code execution, data theft, or site takeover. The flaw carries a CVSS 9.8 rating with a fully remote, no-authentication, no-interaction vector and was reported by Patchstack; there is no public exploit identified at time of analysis and it is not listed in CISA KEV. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the miniOrange Headless Single Sign On plugin (version 1.6 or earlier) to be installed and active on a WordPress site, with a reachable request path that passes attacker-controlled data into the plugin's PHP unserialize() call - consistent with the AV:N/AC:L/PR:N/UI:N vector, no authentication, user interaction, or non-default configuration is needed to reach the sink. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | All CVSS signals point to high priority: AV:N/AC:L/PR:N/UI:N means a remote, unauthenticated attacker can trigger the flaw with low complexity and no user interaction, and C:H/I:H/A:H reflects total compromise potential, yielding the 9.8 base score. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker sends a crafted HTTP request to the plugin's unauthenticated SSO endpoint containing a serialized PHP payload that instantiates a gadget-chain object. When the plugin calls unserialize() on that input, the object's magic methods execute, allowing the attacker to write files, run SQL, or execute code and take over the WordPress site. … |
| Remediation | No vendor-released patch version was identified in the available data; the input confirms versions up to 1.6 are affected but does not name a fixed release, so administrators should consult the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/headless-single-sign-on/vulnerability/wordpress-headless-single-sign-on-plugin-1-6-php-object-injection-vulnerability) and the WordPress plugin repository for an update newer than 1.6 and apply it once available. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all WordPress instances using miniOrange Headless SSO plugin version 1.6 or earlier; temporarily disable the plugin to stop exploit surface if business operations permit. …
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External POC / Exploit Code
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