Stored XSS via unescaped asm_code snippet metadata
Published Jul 23, 2026 · Updated Jul 23, 2026
Stored XSS in mahethekiller Header Footer Script Adder 2.1 and earlier allows remote authenticated users to inject scripts via asm_code metadata. The Pro administration path stores attacker-controlled asm_code snippet metadata without adequate sanitization, and public rendering paths emit the stored value without context-appropriate escaping. Author-level access is required to save the payload; it then executes in the browser of anyone opening a page where the affected snippet is rendered.
Summary
What happened
Stored XSS in mahethekiller Header Footer Script Adder 2.1 and earlier allows remote authenticated users to inject scripts via asm_code metadata. The Pro administration path stores attacker-controlled asm_code snippet metadata without adequate sanitization, and public rendering paths emit the stored value without context-appropriate escaping. Author-level access is required to save the payload; it then executes in the browser of anyone opening a page where the affected snippet is rendered.
The record
- CVE
- CVE-2026-15394
- Published
- Jul 23, 2026
- Updated
- Jul 23, 2026
- Vendor
- mahethekiller
- Product
- Header Footer Script Adder
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 23, 2026CVE publishedPublication date reported by the CVE source.
- Jul 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <=2.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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