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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mcgill:loris:*:*:*:*:*:*:*:*", "matchCriteriaId": "4AEE921E-77AD-44F9-AC03-DCD447CF3897", "versionEndIncluding": "27.0.2", "versionStartIncluding": "15.10", "vulnerable": true}, {"criteria": "cpe:2.3:a:mcgill:loris:28.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "D358B66A-04AC-44F2-8EF6-4332D8AC00F4", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 15.10 to before 27.0.3 and 28.0.1, there is a potential for a cross-site scripting attack in the survey_accounts module if a user provides an invalid visit label. While the data is properly JSON encoded, the Content-Type header is not set causing the web browser to interpret the payload as HTML, opening the possibility of a cross-site scripting if a user is tricked into following an invalid link. This vulnerability is fixed in 27.0.3 and 28.0.1."}], "id": "CVE-2026-35403", "lastModified": "2026-04-21T20:06:28.810", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 4.7, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-04-08T19:25:23.893", "references": [{"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/aces/Loris/security/advisories/GHSA-776p-5pwh-vc8p"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[15.10,27.0.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[28.0.0,28.0.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Loris", "source": "cna", "vendor": "aces"}, "product": "loris", "vendor": "aces"}], "analysis": {"en": {"generated_at": "2026-04-08T20:36:15.051171+00:00", "value": {"mitigation_remediation": ["Upgrade LORIS to version 27.0.3 or 28.0.1 or later.", "If upgrade is not immediately possible, limit or block access to the survey_accounts module until the upgrade is performed."], "summary": {"action": "Patch ASAP", "impact": "Remote cross\u2011site scripting potential"}, "threat_synthesis": {"affected_systems": "Systems running LORIS versions from 15.10 up to, but not including, 27.0.3 and 28.0.1 are affected. The issue is confined to the survey_accounts module and resolves once the application is upgraded to at least 27.0.3 or 28.0.1.", "description_and_impact": "The vulnerability is a potential cross\u2011site scripting flaw in the survey_accounts module. When a user supplies an invalid visit label, the response is properly JSON encoded but the Content\u2011Type header is omitted, causing browsers to treat the payload as HTML. If an attacker crafts a link that includes malicious JavaScript, a victim who clicks that link could have arbitrary code executed in their browser context.", "risk_and_exploitability": "The CVSS score of 6.5 indicates a moderate severity risk. Exploitation requires a victim to follow a crafted link, so social engineering is needed. The EPSS score is unavailable, but the moderate CVSS suggests a non\u2011high likelihood of widespread exploitation. The flaw is not listed in the CISA KEV catalog, reducing the likelihood of public attacks yet the risk remains if a malicious actor targets a vulnerable deployment."}}}}, "created": "2026-04-09T08:18:25.038518+00:00", "updated": "2026-04-09T08:27:47.448842+00:00", "vendors": ["aces", "aces$PRODUCT$loris"]}