Client-side script execution via unescaped msg parameter
Published Mar 30, 2026 · Updated Mar 30, 2026
Reflected XSS in SourceCodester Sales and Inventory System 1.0 allows remote attackers to execute script via a crafted URL. The login page's index.php reads the GET msg parameter and returns it in HTML without sanitization or escaping. A victim must open the attacker-supplied link; the injected script then runs in that user's browser context and can read session data or alter page content.
Summary
What happened
Reflected XSS in SourceCodester Sales and Inventory System 1.0 allows remote attackers to execute script via a crafted URL. The login page's index.php reads the GET msg parameter and returns it in HTML without sanitization or escaping. A victim must open the attacker-supplied link; the injected script then runs in that user's browser context and can read session data or alter page content.
The record
- CVE
- CVE-2026-30556
- Published
- Mar 30, 2026
- Updated
- Mar 30, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 30, 2026CVE publishedPublication date reported by the CVE source.
- Mar 30, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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.
Weakness, pattern, technique
Public exploit references
- Reflected XSS in Inventory System login page PoCproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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