Unauthenticated stored XSS via quantity validation bypass
Published Sep 22, 2026 · Updated Sep 22, 2026
Stored cross-site scripting in WPC Product Bundles for WooCommerce 8.6.6 and earlier allows remote attackers to inject scripts via qty. Quantity validation casts the supplied value to a float but retains the original numeric-prefixed HTML, which is stored verbatim in order item metadata under the _woosb_ids key. No account is required to submit the payload; the script executes when a user opens an affected page, enabling actions or data access in that user's browser context.
Summary
What happened
Stored cross-site scripting in WPC Product Bundles for WooCommerce 8.6.6 and earlier allows remote attackers to inject scripts via qty. Quantity validation casts the supplied value to a float but retains the original numeric-prefixed HTML, which is stored verbatim in order item metadata under the _woosb_ids key. No account is required to submit the payload; the script executes when a user opens an affected page, enabling actions or data access in that user's browser context.
The record
- CVE
- CVE-2026-93836
- Published
- Sep 22, 2026
- Updated
- Sep 22, 2026
- Vendor
- WPClever
- Product
- WPC Product Bundles for WooCommerce
- Classifications
- T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 22, 2026CVE publishedPublication date reported by the CVE source.
- Sep 22, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=8.6.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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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Your stack
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