CVE-2026-30556

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ahsanriaz26gmailcom:sales_and_inventory_system:1.0:*:*:*:*:*:*:*", "matchCriteriaId": "5A75B7A5-65D7-4AF9-BDE8-EBD496A4942B", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A Reflected Cross-Site Scripting (XSS) vulnerability exists in SourceCodester Sales and Inventory System 1.0. The vulnerability is located in the index.php file via the \"msg\" parameter. The application fails to sanitize the input, allowing remote attackers to inject arbitrary web script or HTML via a crafted URL."}, {"lang": "es", "value": "Una vulnerabilidad de cross-site scripting (XSS) reflejado existe en SourceCodester Sales and Inventory System 1.0. La vulnerabilidad se encuentra en el archivo index.php a trav\u00e9s del par\u00e1metro 'msg'. La aplicaci\u00f3n no logra sanear la entrada, permitiendo a atacantes remotos inyectar scripts web o HTML arbitrarios a trav\u00e9s de una URL manipulada."}], "id": "CVE-2026-30556", "lastModified": "2026-06-17T10:32:45.787", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-30556", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-31T17:52:17.427842Z", "version": "2.0.3"}}]}, "published": "2026-03-30T16:16:05.203", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/meifukun/Web-Security-PoCs/blob/main/Inventory-System/XSS-Index-msg.md"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/meifukun/Web-Security-PoCs/blob/main/Inventory-System/XSS-Index-msg.md"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "1.0"}}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "sales_and_inventory_system", "vendor": "sourcecodester"}], "analysis": {"en": {"generated_at": "2026-04-02T03:31:08.585574+00:00", "value": {"mitigation_remediation": ["Update SourceCodester Sales and Inventory System to a version that sanitizes the 'msg' parameter or applies output encoding.", "If an update is not immediately possible, implement server\u2011side input validation and HTML encoding for the 'msg' parameter in index.php.", "Deploy a web application firewall rule to detect and block script or HTML payloads in the 'msg' query string.", "Instruct users to bookmark legitimate URLs and be wary of suspicious links.", "Regularly monitor application logs for attempts to inject malicious scripts via the 'msg' parameter."], "summary": {"action": "Apply Patch", "impact": "Reflected Cross\u2011Site Scripting"}, "threat_synthesis": {"affected_systems": "Affected systems are the SourceCodester Sales and Inventory System 1.0 web application, specifically the index.php handler that processes the \"msg\" parameter. The product is identified by the CPE string cpe:2.3:a:ahsanriaz26gmailcom:sales_and_inventory_system:1.0. No other versions or vendors are currently listed as affected.", "description_and_impact": "The vulnerability is a reflected cross\u2011site scripting flaw found in the index.php file of SourceCodester Sales and Inventory System version 1.0. The application does not sanitize the \"msg\" query parameter, allowing attackers to inject arbitrary JavaScript or HTML when they visit a crafted URL. Consequently, a malicious user could execute scripts in the victim's browser, potentially stealing session cookies, defacing the site, or redirecting users to phishing pages.", "risk_and_exploitability": "The CVSS base score of 6.1 indicates a medium impact, while the EPSS score of less than 1% suggests that very few attackers have exploited this flaw so far. The vulnerability is not catalogued in CISA\u2019s KEV list. An attacker can trigger the flaw simply by visiting a malicious URL, meaning the attack does not require authentication or privileged access. While the likelihood of exploitation is low, the potential for client\u2011side compromise warrants caution, especially if users visit suspicious links."}}}}, "created": "2026-03-30T20:56:26.908634+00:00", "title": "Reflected XSS via msg Parameter in SourceCodester Sales and Inventory System 1.0", "updated": "2026-04-02T07:54:28.519388+00:00", "vendors": ["sourcecodester", "sourcecodester$PRODUCT$sales_and_inventory_system"]}