CVE-2026-30879

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,5.2.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "basercms", "vendor": "baserproject"}], "analysis": {"en": {"generated_at": "2026-04-02T04:56:27.300616+00:00", "value": {"mitigation_remediation": ["Upgrade baserCMS to version\u202f5.2.3 or later."], "summary": {"action": "Apply Patch", "impact": "Cross\u2011Site Scripting"}, "threat_synthesis": {"affected_systems": "All installations of baserCMS built on baserproject prior to version\u202f5.2.3 are vulnerable. The flaw was fixed in release\u202f5.2.3; sites running that version or newer are considered patched.", "description_and_impact": "The vulnerability is a cross\u2011site scripting flaw in baserCMS\u2019s blog post functionality. User\u2011supplied content that appears in a post is not sanitized, allowing an attacker to embed malicious JavaScript. When another visitor loads the compromised post, the script executes in that user\u2019s browser and can steal cookies, deface the page, or trigger further client\u2011side attacks.", "risk_and_exploitability": "The CVSS score of 6.9 indicates a moderate severity, but the EPSS score is below 1% and the vulnerability is not listed in the CISA KEV catalog, implying a low likelihood of current exploitation. Based on the description, it is inferred that the attack vector is a web\u2011based approach where an attacker can create or edit a blog post to inject scripts, making the public blog interface the likely route for exploitation."}}}}, "created": "2026-03-31T19:56:38.833838+00:00", "updated": "2026-04-03T09:10:40.900052+00:00", "vendors": ["baserproject", "baserproject$PRODUCT$basercms"]}