PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-78532 designthemes CVE debrief

Unauthenticated Cross Site Scripting (XSS) in LMS <= 8.3 versions. This high-severity vulnerability requires verification of LMS versions and assessment of exposure to prevent potential user script execution. Defenders responsible for LMS deployments should prioritize verification and patching to mitigate the risk of unauthenticated XSS attacks.

Vendor
designthemes
Product
LMS
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-10
Original CVE updated
2026-10-10
Advisory published
2026-10-10
Advisory updated
2026-10-10

Who should care

Defenders responsible for LMS deployments should assess exposure and prioritize verification of LMS versions.

Why it matters

CVE-2026-78532 is a high-severity unauthenticated XSS vulnerability in LMS versions <= 8.3, requiring verification of LMS versions and assessment of exposure to prevent potential user script execution.

  • User script execution could occur if LMS is not verified and patched
  • Defenders should validate LMS versions to prevent potential XSS exploitation

Technical summary

CVE-2026-78532 is an unauthenticated Cross Site Scripting (XSS) vulnerability in LMS versions <= 8.3. The vulnerability allows for user script execution if LMS is not verified and patched, emphasizing the need for defenders to validate LMS versions and implement input validation and output encoding to prevent potential XSS exploitation.

Defensive priority

Defenders should prioritize verifying LMS versions and assessing exposure, as unauthenticated XSS could lead to user script execution.

Recommended defensive actions

  • Verify LMS version and assess exposure
  • Review user scripts and execution policies
  • Implement input validation and output encoding

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability, with only one reference to a Patchstack report.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-78532 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-78532

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

  • CVE-2026-78532 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-78532

    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.