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CVE-2026-66648 – Unauthenticated Privilege Escalation – Jawn WordPress Theme (≤ 1.4.2)

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Summary

CVE-2026-66648 is a critical unauthenticated privilege escalation vulnerability affecting the Jawn WordPress theme by MVPThemes, in all versions up to and including 1.4.2. The flaw is classified as CWE-266 (Incorrect Privilege Assignment) and carries a CVSS v3.1 base score of 9.8 (Critical), reflecting that it can be exploited remotely, without authentication, and without any user interaction.

Technical details

  • Root cause: Incorrect privilege assignment (CWE-266) within the Jawn theme’s authorization logic, allowing user roles/capabilities to be assigned improperly.
  • Trigger conditions: No authentication or user interaction is required to exploit the flaw.
  • Attack vector: Network — the vulnerability is remotely exploitable over HTTP(S) against any publicly reachable WordPress site running the affected theme.
  • Impact: Successful exploitation allows an unauthenticated attacker to escalate privileges, with confirmed high impact to confidentiality, integrity, and availability — potentially enabling full site takeover (e.g., creation of administrator-level accounts).

Affected software

  • MVPThemes Jawn WordPress theme, versions <= 1.4.2

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: No fixed version has been published in the CVE record at this time. Site owners should check with the theme vendor for an updated release beyond 1.4.2 and apply it as soon as it becomes available.
  • If no patch is available: Restrict or disable the theme’s privilege-related functionality where possible, review WordPress user accounts for unexpected administrator-level users, enforce strong authentication and least-privilege role assignments, and consider placing a web application firewall in front of the site to block anomalous privilege-modification requests until a vendor fix is released.

How IONIX identifies potentially affected assets

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

  • raw response body: /wp-content/themes/jawn/

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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