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PatchSiren cyber security CVE debrief

CVE-2026-5506 lucascaro CVE debrief

The Wavr plugin for WordPress has a Stored Cross-Site Scripting vulnerability via the plugin's `wave` shortcode in all versions up to, and including, 0.2.6. This is due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerability has a CVSS score of 6.4 and a severity of MEDIUM.

Vendor
lucascaro
Product
Wavr
CVSS
MEDIUM 6.4
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 the Wavr plugin for WordPress, particularly those with contributor-level access and above, should be aware of this vulnerability and take steps to mitigate it. This includes reviewing and restricting contributor-level access, monitoring for suspicious activity, and updating the plugin to a version that fixes the vulnerability.

Technical summary

The Wavr plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's `wave` shortcode in all versions up to, and including, 0.2.6. The vulnerability is caused by insufficient input sanitization and output escaping on user supplied attributes. An authenticated attacker with contributor-level access and above can exploit this vulnerability to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Defensive priority

Medium

Recommended defensive actions

  • Update the Wavr plugin to a version that fixes the vulnerability
  • Restrict contributor-level access and above to trusted users
  • Monitor for suspicious activity on the WordPress site
  • 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
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-04-08T07:16:23.203Z and was last modified on 2026-07-24T09:10:00.153Z. The NVD entry is currently Deferred. Evidence is limited to CVE and NVD information. Defenders should verify affected product deployments and review official advisories for validation.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-5506 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-5506

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

  • CVE-2026-5506 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-5506

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

Supplemental references

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.