EUVD-2026-70562
GHSA-5rhc-576m-pw4p
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
XSS with no auth required and scope change; A:N because reflected XSS does not typically impair availability of the underlying service.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
2DescriptionCVE.org
Unauthenticated Cross Site Scripting (XSS) in Under Construction <= 5.82 versions.
AnalysisAI
Unauthenticated cross-site scripting in the Under Construction WordPress plugin (versions ≤ 5.82) allows a remote unauthenticated attacker to inject and execute arbitrary JavaScript in a victim's browser by enticing them to follow a crafted URL. The scope-change vector (S:C) confirms the payload executes in the browser's security context, enabling session token theft, credential harvesting, or malicious redirects against site visitors or administrators. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The Under Construction plugin must be installed and active on the WordPress site, with the vulnerable front-end page publicly accessible (the typical deployment mode, since the plugin is designed to display pages to unauthenticated visitors). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.1 score reflects a network-reachable, low-complexity, zero-privilege XSS requiring only victim interaction (AV:N/AC:L/PR:N/UI:R/S:C). … 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 | Update the Under Construction plugin to a version above 5.82 via the WordPress plugin dashboard or the WordPress.org plugin repository; the Patchstack advisory at the reference URL should confirm the exact patched release version once published. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Disable the Under Construction plugin immediately on all WordPress instances running version 5.82 or earlier unless it is operationally critical; if disablement is not feasible, implement the compensating controls listed below. …
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More in Under Construction
View allThe Under Construction plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including
The Under Construction plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including
Same weakness CWE-79 – Cross-site Scripting (XSS)
View allShare
External POC / Exploit Code
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