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CVE-2026-57648 Nelio Software CVE debrief

CVE-2026-57648 is a medium-severity vulnerability in the Nelio Content plugin, affecting versions <= 4.3.4. The issue is related to broken access control, which could potentially allow unauthorized access to sensitive areas of the website. The vulnerability was published on June 26, 2026, and last modified on June 29, 2026. The CVSS score for this vulnerability is 4.3, indicating a medium severity level. The vulnerability is categorized under CWE-862. The source of this information is the National Vulnerability Database (NVD) and Patchstack.

Vendor
Nelio Software
Product
Nelio Content
CVSS
MEDIUM 4.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-26
Original CVE updated
2026-06-29
Advisory published
2026-06-26
Advisory updated
2026-06-29

Who should care

Website administrators and security teams using the Nelio Content plugin versions <= 4.3.4 should be aware of this vulnerability and take necessary actions to mitigate the risk. This vulnerability could potentially allow attackers to access sensitive areas of the website without proper authorization. It is recommended to update the plugin to a version that fixes this issue.

Technical summary

CVE-2026-57648 is a broken access control vulnerability in the Nelio Content plugin. The vulnerability has a CVSS score of 4.3 and a severity level of medium. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N. This means that the vulnerability can be exploited remotely, requires low privileges, and has a low impact on confidentiality, but a low impact on integrity and availability. The vulnerability is categorized under CWE-862.

Defensive priority

Medium priority should be given to patching this vulnerability, as it could potentially allow unauthorized access to sensitive areas of the website. It is recommended to update the Nelio Content plugin to a version that fixes this issue.

Recommended defensive actions

  • Update the Nelio Content plugin to a version that fixes this issue.
  • Review website logs for any suspicious activity related to the Nelio Content plugin.
  • Implement additional security measures to restrict access to sensitive areas of the website.

Evidence notes

The source of this information is the National Vulnerability Database (NVD) and Patchstack. The vulnerability was published on June 26, 2026, and last modified on June 29, 2026. The CVSS score for this vulnerability is 4.3, indicating a medium severity level.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-57648 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-57648

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-57648 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-57648

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.