Marcel Karlsson

Marcel Karlsson is a security researcher credited with a single disclosed vulnerability in the WordSec WordPress vulnerability database, ranked #2,870 of 3,917 contributors. The disclosure was published in 2026.

The finding is a Improper Neutralization Of Input During Web Page Generation issue. It carries a CVSS score of 6.4.

The affected software is WordPress 7.1.

The issue has since been patched by the vendor.

2026

Critical

High

Medium

Low

Global Rank

#2870

of 3,917 researchers

Vulns

Critical0

High0

Medium1

Low0

Affected Assets

1core version

Avg CVSS

6.4

Average score of vulnerabilities

Researcher Submissions

1 records


2026-10-29 00:00	WordPress Core 6.6.0 - 7.1.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Unsafe Interactivity API Binding Properties WordPress 7.1 6.6.0 – 7.1.3 · 6 branches	`N/A`	6.4 Medium	Alex Concha	Yes

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