CVE-2026-39521

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.3.1]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Nelio Content", "source": "cna", "vendor": "Nelio Software"}, "product": "nelio_content", "vendor": "nelio_software"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "wordpress", "vendor": "wordpress"}], "analysis": {"en": {"generated_at": "2026-04-13T18:47:12.146231+00:00", "value": {"mitigation_remediation": ["Update Nelio Content to the latest release that addresses the SSRF flaw. ", "If an update is not available, uninstall or deactivate the Nelio Content plugin to remove the attack vector. ", "Review the WordPress installation for other vulnerable plugins and apply patches promptly. ", "Monitor outbound traffic for unexpected requests originating from the WordPress server to detect potential abuse."], "summary": {"action": "Apply Patch", "impact": "Server\u2011Side Request Forgery"}, "threat_synthesis": {"affected_systems": "Nelio Software\u2019s Nelio Content plugin is affected. All releases from the earliest version through 4.3.1 are vulnerable. No higher versions are mentioned as impacted.", "description_and_impact": "The vulnerability allows an attacker to force the WordPress server running Nelio Content to send arbitrary HTTP requests to any target reachable from the internal network. This Server\u2011Side Request Forgery (CWE\u2011918) could expose sensitive internal services or data, and in some cases be used to pivot to further attacks. The impact is a potential breach of confidentiality and, if the application or network resources suffer denial of service from excessive requests, an availability threat as well.", "risk_and_exploitability": "The CVSS score of 4.9 places the issue in the moderate severity range, while the EPSS score of less than 1% indicates a low probability of exploitation in the near term. The vulnerability is not listed in the CISA KEV catalog, so there is no confirmed exploitation activity recorded. Attackers would need to interact with the plugin\u2019s exposed functionality, most likely through unauthenticated or low\u2011privilege web requests, to trigger the SSRF. No advanced exploit code is documented, but the basic SSRF path could be reused in multi\u2011stage attacks once the initial compromise is achieved."}}}}, "created": "2026-04-08T19:30:28.767987+00:00", "updated": "2026-04-14T16:39:53.624227+00:00", "vendors": ["nelio_software", "nelio_software$PRODUCT$nelio_content", "wordpress", "wordpress$PRODUCT$wordpress"]}