EUVD-2026-89910
GHSA-x62g-qgmr-chj3
Severity by source
AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
Network-reachable but needs a Subscriber account (PR:L) and a non-guaranteed gadget chain (AC:H); object injection can cross the plugin boundary (S:C) with limited confirmed impact (C:L/I:L).
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
2DescriptionCVE.org
Subscriber PHP Object Injection in ShortPixel Image Optimizer <= 6.5.5 versions.
AnalysisAI
PHP object injection in the ShortPixel Image Optimizer WordPress plugin through version 6.5.5 allows an authenticated user with Subscriber-level access or higher to pass attacker-controlled data into an unsafe deserialization path, potentially achieving limited confidentiality and integrity impact inside the plugin's scope. Exploitation is conditional and high-complexity: it only yields meaningful escalation if a usable POP gadget chain exists in WordPress core, another installed plugin, or the active theme, and no public exploit identified at time of analysis. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated WordPress account at Subscriber level or higher (PR:L) on a site running ShortPixel Image Optimizer version 6.5.5 or earlier; the plugin must expose a deserialization sink reachable by that role. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The single provided signal set points to a real-but-conditional issue rather than a high-priority emergency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch version is not confirmed in the available data; consult the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/shortpixel-image-optimiser/vulnerability/wordpress-shortpixel-image-optimizer-plugin-6-5-5-php-object-injection-vulnerability?_s_id=cve and the WordPress plugin repository for the fixed release, then upgrade ShortPixel Image Optimizer from 6.5.5 or earlier to that patched version as the primary fix. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
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