EUVD-2026-62285
GHSA-c2xc-88v3-37g2
Severity by source
AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Unauthenticated network RCE (PR:N/AV:N) but gated by non-default plain permalinks plus a classic theme (AC:H); RCE crossing plugin-to-server boundary yields S:C and full C/I/A impact.
Primary rating from Vendor (wpscan).
CVSS VectorVendor: wpscan
Lifecycle Timeline
4DescriptionCVE.org
The Broken Link Checker WordPress plugin before 2.4.12 does not limit which query variables it accepts from user input on sites using plain permalinks, allowing unauthenticated users to overwrite arbitrary PHP global variables, and to execute arbitrary code on the server when a classic (non-block) is active.
Articles & Coverage 1
AnalysisAI
Unauthenticated PHP object/global variable injection in the Broken Link Checker WordPress plugin before 2.4.12 allows attackers to overwrite arbitrary PHP global variables via unfiltered query variables on sites using plain permalinks, escalating to remote code execution when a classic (non-block) theme is active. The flaw is reachable by any unauthenticated visitor (CVSS 3.1 base 9.0, PR:N) but requires the AC:H preconditions of plain permalinks plus a classic theme, so it is not universally exploitable. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires three concrete conditions drawn from the description: (1) the vulnerable Broken Link Checker plugin at a version before 2.4.12 must be installed and active; (2) the WordPress site must be configured with PLAIN permalinks (not the default pretty/rewrite permalinks) - this is what lets the unfiltered query variables reach the plugin; and (3) a CLASSIC, non-block theme must be active for the global-variable overwrite to escalate into arbitrary PHP code execution. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are mixed and should be weighed together. … 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 | Vendor-released patch: upgrade Broken Link Checker to version 2.4.12 or later, which limits the query variables the plugin will accept - this is the primary and recommended fix (see https://wpscan.com/vulnerability/a23b76eb-107d-4e02-8eae-c3c5fa5b003d/). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all WordPress installations for Broken Link Checker plugin presence and identify instances using plain permalinks and classic themes. …
Sign in for detailed remediation steps and compensating controls.
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External POC / Exploit Code
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