CVE-2026-78152 Overview
CVE-2026-78152 affects the SureRank SEO plugin for WordPress in versions before 1.10.1. The plugin includes registered user email addresses in structured data output on public pages by default. Unauthenticated visitors can retrieve the email address of any user who has published content on an affected site. The flaw is classified under [CWE-200] Information Exposure and requires no authentication or user interaction to exploit.
Critical Impact
Unauthenticated attackers can harvest email addresses of content authors from any public page rendered by a vulnerable SureRank installation, enabling targeted phishing and credential-stuffing campaigns.
Affected Products
- SureRank SEO WordPress plugin versions prior to 1.10.1
- WordPress sites with SureRank installed and content published by registered users
- Default plugin configurations that do not manually exclude author email data from structured output
Discovery Timeline
- 2026-09-12 - CVE-2026-78152 published to NVD
- 2026-09-14 - Last updated in NVD database
Technical Details for CVE-2026-78152
Vulnerability Analysis
SureRank generates schema.org structured data blocks (typically JSON-LD) that search engines consume to enrich search results. Prior to version 1.10.1, the plugin included the registered account email of the content author in these blocks by default. Because structured data is rendered inline on public-facing pages, any anonymous HTTP request returning the page also returned the email address.
The issue is a design and default-configuration flaw rather than a memory-safety bug. No authentication, elevated privileges, or user interaction are required. An attacker only needs to fetch published URLs and parse the emitted structured data to collect a list of authors and their email addresses. The impact is limited to confidentiality of one data element per author, with no direct effect on integrity or availability.
Root Cause
The plugin populated the author or equivalent schema property with the WordPress user record's user_email field instead of a public-facing value such as display name or a site-configured contact address. There was no opt-in gate or exclusion filter enabled by default, so any site publishing content exposed those addresses to unauthenticated scrapers.
Attack Vector
Exploitation is trivial and can be automated at scale. An attacker enumerates published URLs on a target WordPress site, requests each page over HTTP, and extracts the JSON-LD structured data block. The email property under the author schema yields the registered account address. Harvested addresses are commonly reused for phishing, WordPress admin login attempts, and credential-stuffing against the same accounts on third-party services.
No exploitation code is required beyond a standard HTTP client and a JSON parser. Refer to the WPScan Vulnerability Report for advisory details.
Detection Methods for CVE-2026-78152
Indicators of Compromise
- Repeated unauthenticated GET requests from a single source enumerating /author/, /?p=, and post permalink patterns
- Web server logs showing high-volume crawling of published post URLs without corresponding asset requests
- Presence of "email" fields inside application/ld+json script blocks in rendered page HTML
Detection Strategies
- Fetch a sample of published pages and inspect the JSON-LD output for author email fields; presence confirms exposure
- Query the installed SureRank plugin version and flag any host running a version below 1.10.1
- Correlate WordPress access logs with subsequent phishing or login-attempt spikes targeting the same author accounts
Monitoring Recommendations
- Alert on scraping patterns that request only HTML pages and skip static assets, characteristic of structured-data harvesters
- Monitor authentication logs for credential-stuffing attempts against WordPress accounts whose emails appear in public structured data
- Track outbound content changes so newly published posts are re-scanned for inadvertent email disclosure
How to Mitigate CVE-2026-78152
Immediate Actions Required
- Upgrade the SureRank SEO plugin to version 1.10.1 or later on all WordPress sites
- Audit rendered pages after upgrade to confirm the email field is no longer emitted in JSON-LD structured data
- Rotate or notify author accounts whose email addresses were previously exposed, especially those with administrative roles
Patch Information
The vendor addressed the issue in SureRank SEO 1.10.1 by excluding user account email addresses from default structured-data output. Site administrators should apply the update through the WordPress plugin manager or by deploying the patched release manually. See the WPScan Vulnerability Report for the advisory.
Workarounds
- If immediate patching is not possible, disable the SureRank SEO plugin until the update can be applied
- Configure author accounts to use a dedicated, non-sensitive contact address that can safely appear in structured data
- Deploy a web application firewall rule or output filter that strips email properties from application/ld+json blocks before responses leave the server
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
