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CVE-2026-78477 – Unauthenticated Privilege Escalation – Jawn WordPress Theme ≤ 1.4.2

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Summary

CVE-2026-78477 is a critical incorrect privilege assignment (CWE-266) vulnerability in the Jawn WordPress theme by MVPThemes, affecting all versions up to and including 1.4.2. The flaw allows unauthenticated attackers to elevate their privileges to that of an administrator, resulting in full site compromise. It carries a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: incorrect privilege assignment (CWE-266) within the Jawn theme’s code
  • Trigger conditions: no authentication or user interaction is required to exploit the flaw
  • Attack vector: network — the theme can be targeted remotely over HTTP/HTTPS on any site running the affected code
  • Impact: unauthenticated attackers can escalate their privileges to administrator level, enabling full compromise of confidentiality, integrity, and availability of the WordPress site

Affected software

  • MVPThemes Jawn WordPress theme, versions 0 through 1.4.2 (inclusive)

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 patched version of the Jawn theme has been identified in available advisories; site owners should treat all versions up to 1.4.2 as vulnerable
  • If no patch is available: remove or replace the Jawn theme, restrict administrative access, monitor sites for unauthorized administrator accounts, and watch vendor channels for an updated release before restoring the theme to production

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/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.

Are you exposed?

Get a free report of your organization’s exposure to this CVE and threat

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