EUVD-2026-41332
GHSA-3236-q4rc-wfw4
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Remote, low-complexity object injection reachable by a Contributor (PR:L), no user interaction, with gadget-chain-driven high C/I/A impact within the same WordPress instance (S:U).
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionCVE.org
Contributor PHP Object Injection in Werkstatt <= 4.8.3 versions.
AnalysisAI
PHP Object Injection in the Werkstatt WordPress theme (fuelthemes) through version 4.8.3 lets a Contributor-level user pass attacker-controlled data into an unsafe deserialization routine, enabling instantiation of arbitrary PHP objects. With the right POP gadget chain present in WordPress core, another plugin, or the theme itself, this can escalate to file operations, SQL manipulation, or remote code execution. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated account with at least Contributor privileges on a WordPress site running the Werkstatt theme version 4.8.3 or earlier (CVSS PR:L confirms low-privilege authentication is needed, so this is not unauthenticated). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H = 8.8 High) indicates network exploitation, low attack complexity, no user interaction, and low privileges required - consistent with an authenticated Contributor account. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers or is granted a Contributor account on a WordPress site running Werkstatt <= 4.8.3, then submits a crafted serialized PHP payload through the theme feature that deserializes user input. When the theme calls unserialize(), the payload instantiates objects that trigger a gadget chain in an installed plugin, leading to file write, data tampering, or remote code execution. … |
| Remediation | No specific fixed version was provided in the source data, so the patch status is: no vendor-released patch version identified at time of analysis - check the Patchstack advisory (https://patchstack.com/database/wordpress/theme/werkstatt/vulnerability/wordpress-werkstatt-theme-4-8-3-php-object-injection-vulnerability) and the fuelthemes/ThemeForest changelog for a release above 4.8.3 and upgrade to it as the primary fix. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 hours: Scan all WordPress installations for Werkstatt theme usage through version 4.8.3; immediately deactivate the theme or restrict Contributor user permissions to essential personnel. …
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External POC / Exploit Code
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