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PatchSiren cyber security CVE debrief

CVE-2026-57403 Milan Petrovic CVE debrief

A Cross-site Scripting vulnerability was found in the GD Security Headers plugin. This issue allows for Reflected XSS and affects versions up to and including 1.8. The vulnerability is classified as a Cross-site Scripting (XSS) issue due to improper neutralization of input during web page generation. Users of the GD Security Headers plugin, especially those with versions up to and including 1.8, should be aware of this vulnerability and take necessary actions. The CVE record was published on 2026-07-13T10:16:33.950Z and has not been modified since then.

Vendor
Milan Petrovic
Product
GD Security Headers
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-13
Original CVE updated
2026-07-13
Advisory published
2026-07-13
Advisory updated
2026-07-13

Who should care

Users of the GD Security Headers plugin, especially those with versions up to and including 1.8, should be aware of this vulnerability and take necessary actions. This includes reviewing and validating user inputs to ensure proper neutralization and implementing additional security measures to detect and prevent XSS attacks.

Technical summary

The CVE-2026-57403 vulnerability is classified as a Cross-site Scripting (XSS) issue due to improper neutralization of input during web page generation. The vulnerability is rated as HIGH with a CVSS score of 7.1. It affects the GD Security Headers plugin from version n/a through 1.8. Users of the GD Security Headers plugin, especially those with versions up to and including 1.8, should be aware of this vulnerability and take necessary actions.

Defensive priority

High priority should be given to updating the GD Security Headers plugin to a version beyond 1.8 to mitigate this vulnerability.

Recommended defensive actions

  • Update the GD Security Headers plugin to a version beyond 1.8.
  • Review and validate user inputs to ensure proper neutralization.
  • Implement additional security measures to detect and prevent XSS attacks.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record was published on 2026-07-13T10:16:33.950Z and has not been modified since then. The NVD entry is currently in the 'Received' status. This information is based on the supplied source corpus. Defenders should verify the accuracy of this information and review the official CVE record and NVD entry for further details.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-57403 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-57403

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

  • CVE-2026-57403 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-57403

    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.