EUVD-2026-90804
GHSA-mq84-6p5r-rh8w
Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Authenticated contributor injection (PR:L) with victim view required (UI:R); stored script crosses into victim's browser context (S:C) with low C/I; availability impact not substantiated, so A:N.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
2DescriptionCVE.org
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Wpmet Metform metform allows Stored XSS.This issue affects Metform: from n/a through 4.3.0.
AnalysisAI
Stored cross-site scripting in the Wpmet Metform WordPress plugin (versions through 4.3.0) lets a low-privilege authenticated user, such as a contributor, plant a malicious script inside form fields or plugin settings; the payload is then stored and executes in the browser of any higher-privileged user (typically an administrator or editor) who views the affected page. The base CVSS score is 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N), and the practical risk is LOW-to-MEDIUM because exploitation is gated by two prerequisites: an authenticated account with at least contributor-level access and a victim who subsequently opens the page where the stored payload renders. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated WordPress account with at least low-privilege (e.g., contributor-level) access to inject the payload into a Metform field/setting (PR:L), AND a victim user - typically an administrator or editor - must subsequently view the page where the stored payload renders (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is LOW-to-MEDIUM despite the 6.5 CVSS base score. … 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 | A specific fixed version is not stated in the provided intelligence, so administrators should consult the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/metform/vulnerability/wordpress-metform-plugin-4-3-0-cross-site-scripting-xss-vulnerability?_s_id=cve) or the Wpmet vendor channel to confirm whether a release later than 4.3.0 addresses this issue and upgrade as soon as that patched build is verified; until then the plugin should be considered unpatched at 4.3.0. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
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External POC / Exploit Code
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