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PatchSiren cyber security CVE debrief

CVE-2026-39711 stmcan CVE debrief

A vulnerability was found in RT-Theme 18 | Extensions rt18-extensions. It has been classified as problematic. Affected is an unknown function of the component Extensions. The manipulation leads to insertion of sensitive information into sent data. The issue is caused by the lack of proper validation of user-supplied data. This can lead to the exposure of sensitive information. The vulnerability is identified as CVE-2026-39711 and is rated as MEDIUM with a CVSS score of 5.3.

Vendor
stmcan
Product
RT-Theme 18 | Extensions
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-08
Original CVE updated
2026-07-24
Advisory published
2026-04-08
Advisory updated
2026-07-24

Who should care

Users of RT-Theme 18 | Extensions rt18-extensions up to version 2.5 should take necessary precautions to ensure their installations are secure.

Technical summary

The vulnerability, known as CVE-2026-39711, is an Insertion of Sensitive Information Into Sent Data issue in the RT-Theme 18 | Extensions rt18-extensions plugin. This vulnerability allows for the retrieval of embedded sensitive data. The affected versions range from n/a through 2.5. The CVSS score for this vulnerability is 5.3, indicating a medium severity level.

Defensive priority

Medium priority should be given to patching this vulnerability, as it could potentially lead to the exposure of sensitive information.

Recommended defensive actions

  • Inventory and verify affected installations of RT-Theme 18 | Extensions rt18-extensions.
  • Apply patches or updates provided by the vendor to address the vulnerability.
  • Monitor for any suspicious activity that could be related to this vulnerability.
  • Consider implementing compensating controls if patching is not immediately feasible.

Evidence notes

The CVE record was published on 2026-04-08T09:16:44.010Z and was last modified on 2026-07-24T20:10:00.147Z. The NVD entry is currently Deferred. Evidence is limited to public CVE and NVD data. Defenders should verify affected installations exist and review official advisories for patches or updates. Compensating controls may be necessary if patching is delayed. Monitoring for suspicious activity related to this vulnerability is recommended. The CVE score is 5.3, indicating medium severity. RT-Theme 18 | Extensions rt18-extensions versions from n/a through 2.5 are affected.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-39711 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-39711

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

  • CVE-2026-39711 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-39711

    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.