EUVD-2026-43386Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-reachable and unauthenticated (AV:N/PR:N/UI:N); AC:H because LFI-to-RCE needs a specific includable/poisonable path, with full C/I/A impact once achieved.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in stmcan RT-Theme 18 | Extensions rt18-extensions allows PHP Local File Inclusion.This issue affects RT-Theme 18 | Extensions: from n/a through <= 2.5.
AnalysisAI
PHP Local File Inclusion in the WordPress RT-Theme 18 | Extensions plugin (rt18-extensions) by stmcan lets remote attackers coerce the plugin into including attacker-influenced local file paths in an include/require statement, exposing sensitive files and potentially achieving code execution if a suitable includable file exists. All versions from an unspecified start through 2.5 are affected. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation targets the include/require path handling in the RT-Theme 18 | Extensions plugin (rt18-extensions <= 2.5) and, per the CVSS vector, requires no authentication (PR:N) and no user interaction (UI:N) over the network (AV:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H, score 8.1) indicates a network-reachable, unauthenticated vulnerability with high impact to confidentiality, integrity, and availability, but with High attack complexity (AC:H) - meaning successful exploitation depends on conditions the attacker does not fully control, such as a specific includable path, PHP configuration, or the presence of a poisonable file. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker sends a crafted HTTP request to a vulnerable rt18-extensions endpoint with a manipulated file-path parameter, steering the plugin's include/require call toward a sensitive server-side file such as wp-config.php or a poisoned log/upload file. Because attack complexity is high, the attacker likely first primes the server (e.g., by seeding malicious content into an includable file) before triggering inclusion to read secrets or execute embedded PHP. … |
| Remediation | No vendor-released patched version is identified in the available data - the advisory records the flaw as affecting rt18-extensions up to and including 2.5 without naming a fixed release, so administrators should consult the Patchstack advisory (https://patchstack.com/database/Wordpress/Plugin/rt18-extensions/vulnerability/wordpress-rt-theme-18-extensions-plugin-2-5-local-file-inclusion-vulnerability) and the stmcan vendor channel for an update beyond 2.5 and upgrade as soon as one is published. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all WordPress instances using rt18-extensions plugin version 2.5 or earlier and assess their internet accessibility; immediately disable or uninstall the plugin on all affected systems. …
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