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CVE-2026-15039 – Unauthenticated Arbitrary File Upload leading to RCE – Gift Cards For WooCommerce P

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Summary

CVE-2026-15039 is a critical unauthenticated arbitrary file upload vulnerability in the Giftware (Gift Cards For WooCommerce Pro) WordPress plugin. The plugin fails to validate the type of files submitted through one of its upload paths, allowing attackers to upload PHP files without authentication. Successful exploitation can lead to full remote code execution on the hosting server, and the flaw carries a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: the plugin does not validate the file type/extension of files submitted via one of its upload endpoints (CWE-434: Unrestricted Upload of File with Dangerous Type).
  • Trigger condition: an attacker submits a file upload request to the vulnerable plugin endpoint without needing any authentication or user interaction.
  • Attack vector: Network (AV:N) — exploitable remotely over HTTP(S) against any internet-exposed WordPress site running the vulnerable plugin.
  • Impact: uploaded files can include executable PHP code, which can be invoked to achieve remote code execution, giving the attacker full control over confidentiality, integrity, and availability of the affected server.

Affected software

  • Giftware (Gift Cards For WooCommerce Pro) WordPress plugin, all versions before 4.2.10

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Update the Giftware (Gift Cards For WooCommerce Pro) plugin to version 4.2.10 or later, which validates uploaded file types.
  • If patching is not immediately possible: disable or deactivate the plugin until it can be updated, and restrict/monitor access to plugin upload endpoints via a web application firewall to block uploads of executable file types (e.g., .php, .phtml).
  • Review server and access logs for unexpected file uploads or unfamiliar PHP files placed in plugin upload directories.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Raw response body: /wp-content/plugins/giftware/

References

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How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

Execute Exploit Validations

By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

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  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
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