CVE WatchOct 3, 2026

CVE-2026-19902

The Ad Inserter – Ad Manager & AdSense Ads plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the Referer header in al

CVSS

6.1

Medium

EPSS

0.3%

p17

KEV

—

Exploit Today

0-100

Published: Oct 1, 2026 · Last modified: Oct 3, 2026 · CWE-79

EPSS · 30d

0.3%EPSS · 30 days0.3%

2026-10-022026-10-25

Technical description

The Ad Inserter – Ad Manager & AdSense Ads plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the Referer header in all versions up to, and including, 2.8.18 due to insufficient input sanitization and output escaping on the '{search-query}' dynamic tag. When an ad block's code contains that tag, replace_ai_tags() reads $_SERVER['HTTP_REFERER'] and tests it with the regex /[\.\/](google|yahoo|bing|ask)\.[a-z\.]{2,5}[\/]/i. The leading [\.\/] class matches a literal slash, so any referrer merely containing a segment such as '/google.com/' passes as a search-engine referral; the plugin then percent-decodes the referring query with parse_str() and substitutes the resulting 'q' (or 'p') value into the block via preg_replace() with no escaping. This makes it possible for unauthenticated attackers to execute arbitrary JavaScript in the context of the site for any visitor, including a signed-in administrator, by luring them to an attacker-controlled page that frames or links to any ordinary post. Exploitation requires the site to have an ad block whose code uses the '{search-query}' tag with automatic insertion enabled — a documented plugin feature used as intended.

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2026-1160474.3 MED

18.0%

——5A vulnerability has been found in Privoce Vocechat up to 0.9.121. This issue affects some unknown processing of the file widget.html of the component Query Parameter Handler. Such manipulation of the argument welcome leads to cross site scripting. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.9h CVE-2026-1160043.5 LOW

9.6%

——3A security vulnerability has been detected in onyx-dot-app Onyx up to 5.0.0. Impacted is an unknown function of the file web/src/app/craft/components/output-panel/PreviewTab.tsx. The manipulation leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.14h CVE-2026-1159824.3 MED

18.9%

——6A vulnerability was detected in phpIPAM up to 1.8.3. Affected by this issue is the function create_rack_link of the file app/tools/racks/show-rack-popup.php of the component Rack Link Creation. Performing a manipulation of the argument deviceid results in cross site scripting. Remote exploitation of the attack is possible. The exploit is now public and may be used. The vendor was contacted early about this disclosure.19h CVE-2026-1159812.4 LOW

16.6%

——5A security vulnerability has been detected in phpIPAM up to 1.8.3. Affected by this vulnerability is an unknown functionality of the file upgrade/index.php. Such manipulation of the argument REQUEST_URI leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure.19h CVE-2026-1141946.5 MED

7.8%

——2Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Igor Funa Ad Inserter ad-inserter allows Reflected XSS.This issue affects Ad Inserter: from n/a through 2.8.18.1d CVE-2026-1159936.8 MED

24.9%

——7Stored XSS vulnerability in the “Notes” field of the Checklists in Cervantes version v1.3-beta could allow an attacker to execute arbitrary code in another user's browser with elevated privileges1d