Subscriber-level stored XSS via unsanitized stm_f_s
Published Oct 10, 2026 · Updated Oct 10, 2026
Stored XSS in StylemixThemes Motors 1.4.123 and earlier allows remote authenticated users to execute scripts via stm_f_s. The Motors - Car Dealership & Classified Listings Plugin's stm_ajax_add_a_car handler processes this input without sufficient sanitization, and stored content is rendered without sufficient escaping. Its nonce is exposed through wp_footer on every page, enabling Subscriber-level injection; scripts execute in the browser when an affected page is visited, not directly on the server.
Summary
What happened
Stored XSS in StylemixThemes Motors 1.4.123 and earlier allows remote authenticated users to execute scripts via stm_f_s. The Motors - Car Dealership & Classified Listings Plugin's stm_ajax_add_a_car handler processes this input without sufficient sanitization, and stored content is rendered without sufficient escaping. Its nonce is exposed through wp_footer on every page, enabling Subscriber-level injection; scripts execute in the browser when an affected page is visited, not directly on the server.
The record
- CVE
- CVE-2026-96563
- Published
- Oct 10, 2026
- Updated
- Oct 10, 2026
- Vendor
- StylemixThemes
- Product
- Motors - Car Dealership & Classified Listings Plugin
- Classifications
- CWE-79, T1189
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 10, 2026CVE publishedPublication date reported by the CVE source.
- Oct 10, 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 <=1.4.123
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
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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