EUVD-2026-42801
GHSA-ffm3-68jx-q7h9
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Stored XSS requires victim to visit the injected page (UI:R); Contributor authentication required (PR:L); scope change confirmed as payload crosses into victim browser context.
Primary rating from Vendor (wordfence).
CVSS VectorVendor: wordfence
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
2DescriptionCVE.org
The Sudoku Shortcode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'background' parameter in the 'sudoku-sc' shortcode in all versions up to, and including, 1.0.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AnalysisAI
Stored Cross-Site Scripting in the Sudoku Shortcode WordPress plugin (all versions through 1.0.0) allows authenticated Contributors to inject persistent malicious scripts via the unsanitized 'background' parameter of the 'sudoku-sc' shortcode. Once injected into a page or post, the payload executes in the browser of every subsequent visitor, including administrators, enabling session hijacking, credential theft, or unauthorized administrative actions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold an active WordPress account with at minimum Contributor-level role on the target site. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD-assigned CVSS 3.1 score of 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N) reflects a medium-severity finding. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers or obtains a Contributor-level account on the target WordPress site, then creates or edits a post containing a sudoku-sc shortcode with a crafted 'background' parameter embedding JavaScript (e.g., a session-stealing payload targeting document.cookie). The post is published or submitted for review, and when an administrator or other authenticated user visits the page to review or view it, the script executes silently in their browser, potentially exfiltrating their session token to an attacker-controlled server and enabling account takeover. … |
| Remediation | No vendor-released patched version is independently confirmed from the available data; the WordPress plugin trac references include trunk code which may reflect in-development fixes but no tagged release has been confirmed. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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