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ShortPixel Image Optimizer CVE-2026-97246

| EUVDEUVD-2026-89910 MEDIUM
Deserialization of Untrusted Data (CWE-502)
2026-09-30 Patchstack GHSA-x62g-qgmr-chj3
PHP WordPress Deserialization Wordpress Plugin Shortpixel Image Optimizer Shortpixel
4.9
CVSS 3.1 · Vendor: Patchstack
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Severity by source

Vendor (Patchstack) PRIMARY
4.9 MEDIUM
AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
vuln.today AI
4.9 MEDIUM

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).

3.1 AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
4.0 AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

2
Analysis Generated
Sep 30, 2026 - 13:48 vuln.today
CVE Published
Sep 30, 2026 - 12:28 cve.org
MEDIUM 4.9

DescriptionCVE.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

Access
technique details hidden
Delivery
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Exploit
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Execution
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Impact
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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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CVE-2026-97246 vulnerability details – vuln.today
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