CVE-2026-8626Public exploitNetwork attack vector

Reflected XSS via unescaped PHP_SELF output

Published May 20, 2026 · Updated May 20, 2026

Reflected XSS in the SponsorMe plugin for WordPress 0.5.2 and earlier allows remote attackers to execute scripts via a crafted URL. The plugin inserts the PHP_SELF value into form action and anchor href attributes without sanitizing input or escaping HTML output. Exploitation requires a user to open an attacker-controlled wp-admin/admin.php path, after which the script runs in that user's browser context.

CVSS severity6.1
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Reflected XSS in the SponsorMe plugin for WordPress 0.5.2 and earlier allows remote attackers to execute scripts via a crafted URL. The plugin inserts the PHP_SELF value into form action and anchor href attributes without sanitizing input or escaping HTML output. Exploitation requires a user to open an attacker-controlled wp-admin/admin.php path, after which the script runs in that user's browser context.

The record

CVE
CVE-2026-8626
Published
May 20, 2026
Updated
May 20, 2026
Vendor
Owen Cutajar
Product
SponsorMe
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 20, 2026CVE publishedPublication date reported by the CVE source.
  2. May 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=0.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Owen Cutajar · SponsorMeversion=0 <=0.5.2

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo