EUVD-2026-89885
GHSA-w53v-75gj-cm6q
Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Network-reachable, low-complexity deserialization requiring an Editor account (PR:H, UI:N); object injection with a gadget chain yields full C/I/A impact within the WordPress site scope (S:U).
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
2DescriptionCVE.org
Editor PHP Object Injection in Ultimate Addons for Contact Form 7 <= 3.5.51 versions.
AnalysisAI
PHP object injection in the Themefic Ultimate Addons for Contact Form 7 WordPress plugin (versions through 3.5.51) allows an authenticated user holding the Editor role to feed crafted serialized data into a plugin code path that calls PHP's unserialize, which can lead to code execution, file operations, or data tampering if a viable POP gadget chain exists in the plugin or elsewhere on the site. The issue is network-reachable and needs no user interaction, but exploitation is access-gated by the Editor-privilege prerequisite, and no public exploit code has been identified at time of analysis; EPSS data was not provided.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated WordPress user with the Editor role (per CVSS PR:H and the advisory title) on a site running Ultimate Addons for Contact Form 7 version 3.5.51 or earlier. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but access-gated risk. … 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 | No vendor-released patch version is confirmed in the provided intelligence, so administrators should check the Patchstack advisory and the Themefic plugin changelog for a release later than 3.5.51 and update as soon as one is published, then verify the fix before relying on it. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all WordPress installations to identify any using the Themefic Ultimate Addons for Contact Form 7 plugin at version 3.5.51 or earlier; if the plugin is not essential, disable and remove it, and immediately review all user accounts with Editor privileges to ensure they are trusted and necessary. …
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External POC / Exploit Code
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