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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "1.2"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "MyBB Last User's Threads in Profile Plugin", "source": "cna", "vendor": "MyBB"}, "product": "mybb", "vendor": "mybb"}], "analysis": {"en": {"generated_at": "2026-04-04T17:22:25.353291+00:00", "value": {"mitigation_remediation": ["Verify the installed plugin version and compare it to the known vulnerable release.", "Temporarily disable or remove the MyBB Last User's Threads in Profile Plugin until a patch is released by the plugin author.", "Monitor the MyBB community forums or the plugin\u2019s author page for an updated, fixed version and apply it promptly.", "If an update is not available, consider implementing output escaping on the profile page or disabling the subject field to prevent script rendering."], "summary": {"action": "Apply Patch", "impact": "Persistent Cross\u2011Site Scripting via thread subject injection"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the MyBB Last User's Threads in Profile Plugin version 1.2 from the MyBB community. No other variants or versions are listed as affected.", "description_and_impact": "A persistent cross\u2011site scripting flaw exists in MyBB Last User's Threads in Profile Plugin 1.2, allowing an attacker to embed script tags into the subject field of a thread. When other users view the attacker's profile page, the malicious script executes in their browsers, potentially enabling the attacker to steal session tokens, deface content, or redirect users to malicious sites. The weakness is a classic input validation failure that results in unsanitized user\u2011supplied content being rendered in a browser context.", "risk_and_exploitability": "The CVSS base score is 5.1, indicating a moderate severity. EPSS data is not available, and the flaw is not listed in the CISA KEV catalog, implying no known widespread exploitation at this time. The likely attack vector requires the adversary to create a thread with a malicious subject, which typically needs at least member\u2011level access or the ability to submit threads. Once a thread is created, attackers can target any visitor to the profile page, making the impact potentially wide across users on the affected forum."}}}}, "created": "2026-04-06T20:27:02.023190+00:00", "updated": "2026-04-06T21:57:37.895178+00:00", "vendors": ["mybb", "mybb$PRODUCT$mybb"]}