CVE-2018-25247

<!-- PoC for CVE-2018-25247 MyBB Like Plugin Stored XSS --> <!-- Step 1: Attacker logs in and creates a new post/thread --> <!-- Step 2: Inject the following payload into the Post Subject field --> <img src=x onerror=alert('XSS')> <!-- Step 3: Submit the post --> <!-- Step 4: 'Like' the created post using the plugin --> <!-- Step 5: Victim views the attacker's profile page --> <!-- Result: The JavaScript alert executes in the victim's browser -->

{"cve": {"id": "CVE-2018-25247", "sourceIdentifier": "[email protected]", "published": "2026-04-04T14:16:20.500", "lastModified": "2026-04-20T14:30:36.060", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "MyBB Like Plugin 3.0.0 contains a cross-site scripting vulnerability that allows attackers to inject malicious scripts by creating posts or threads with unvalidated subject content. Attackers can craft post subjects containing script tags that execute when other users view the attacker's profile, where liked posts are displayed without sanitization."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/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": 5.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "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:mybb:thankyou\\/like_system:*:*:*:*:*:mybb:*:*", "versionEndIncluding": "3.0.0", "matchCriteriaId": "9B4B39CA-3B43-424A-8A41-15EE6FC3E42B"}]}]}], "references": [{"url": "https://community.mybb.com/mods.php?action=view&pid=360", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.exploit-db.com/exploits/45179", "source": "[email protected]", "tags": ["Exploit", "VDB Entry"]}, {"url": "https://www.vulncheck.com/advisories/mybb-like-plugin-cross-site-scripting-via-user-profiles", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}