CVE-2026-126697
Received Received - Intake

Backdoor in Quick Page/Post Redirect WordPress Plugin

Publication date: 2026-11-14

Last updated on: 2026-11-14

Assigner: WPScan

Description
The Quick Page/Post Redirect Plugin WordPress plugin before 5.2.4 was distributed with a hidden update mechanism that fetched Quick Page/Post Redirect Plugin WordPress plugin before 5.2.4 updates from its author's own server instead of WordPress.org, which was used to push a backdoored build to sites, allowing the attacker controlling that server to inject arbitrary content into pages and to deliver arbitrary code to affected sites. Version 5.2.1, as published on WordPress.org, bundled the Quick Page/Post Redirect Plugin WordPress plugin before 5.2.4 Update Checker library (updater/ directory) configured to poll https://anadnet.com/updates/?action=get_metadata&slug=quick-pagepost-redirect-Quick Page/Post Redirect Plugin WordPress plugin before 5.2.4. In March 2021 that server delivered a modified 5.2.3 build, different from the 5.2.3 later published on WordPress.org, which kept the update channel and added a the_content filter that, for logged-out visitors on single posts and pages, fetched content from https://w.anadnet.com/bro/3/ (passing the site host, request URI and visitor User-Agent) and prepended the response to the post (observed serving SEO spam links to search engine crawlers). Because the version string matched a later WordPress.org release, affected sites were not offered a clean update until 5.2.4. Indicators of compromise: - Outbound requests to anadnet.com or w.anadnet.com - An updater/ directory (Quick Page/Post Redirect Plugin WordPress plugin before 5.2.4 Update Checker, Puc v4p10) inside wp-content/Quick Page/Post Redirect Plugin WordPress plugin before 5.2.4/quick-pagepost-redirect-Quick Page/Post Redirect Plugin WordPress plugin before 5.2.4/ - The strings filter_the_content_in_the_main_loop, ppr_pro, QQQEND or w.anadnet.com in page_post_redirect_Quick Page/Post Redirect Plugin WordPress plugin before 5.2.4.php - page_post_redirect_Quick Page/Post Redirect Plugin WordPress plugin before 5.2.4.php with MD5 ad717da18cf8a2b69899c0d7dafee05a (tampered 5.2.3) Remediation: remove the Quick Page/Post Redirect Plugin WordPress plugin before 5.2.4 (it has been closed on WordPress.org), or at minimum reinstall the clean 5.2.4 from WordPress.org, delete any leftover updater/ directory, verify the files with "wp Quick Page/Post Redirect Plugin WordPress plugin before 5.2.4 verify-checksums quick-pagepost-redirect-Quick Page/Post Redirect Plugin WordPress plugin before 5.2.4", clear the opcode cache, and treat any site that ran the tampered build as potentially compromised.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-11-14
Last Modified
2026-11-14
Generated
2026-11-14
AI Q&A
2026-11-14
EPSS Evaluated
N/A
NVD
CVE-2026-126697
EUVD
EUVD-2026-125869

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Unknown Quick Page/Post Redirect Plugin From 5.2.1 (inc) to 5.2.4 (exc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability involves a WordPress plugin called Quick Page/Post Redirect. Attackers modified versions 5.2.1 to 5.2.3 to include a hidden update system that fetched malicious updates from their own server instead of WordPress.org. This allowed them to inject arbitrary content, such as SEO spam, into pages for logged-out visitors by prepending it to posts.

Detection Guidance
  • Check for outbound requests to domains anadnet.com or w.anadnet.com using network monitoring tools like tcpdump, Wireshark, or netstat.
  • Look for the presence of an updater/ directory inside wp-content/plugins/quick-pagepost-redirect/.
  • Search for specific strings in the plugin's PHP file such as filter_the_content_in_the_main_loop, ppr_pro, QQQEND, or w.anadnet.com.
  • Verify the MD5 hash of page_post_redirect_quick-pagepost-redirect.php which should not be ad717da18cf8a2b69899c0d7dafee05a.
Impact Analysis

If your site uses the affected plugin versions, attackers could inject unwanted content like spam links into your pages. This could harm your site's reputation, SEO rankings, and user experience. The backdoor also allowed attackers to deliver arbitrary code to your site.

Mitigation Strategies
  • Remove the Quick Page/Post Redirect plugin entirely from your WordPress installation.
  • If removal is not possible, reinstall the clean version 5.2.4 from WordPress.org.
  • Delete any leftover updater/ directory within the plugin's folder.
  • Verify file integrity using the command wp plugin verify-checksums quick-pagepost-redirect.
  • Clear the opcode cache to ensure no malicious code remains in memory.
  • Treat any site that ran the tampered build as potentially compromised and investigate further.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-126697. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart

Security Radar

News mentioning this vulnerability
Loading related security news...