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PatchSiren cyber security CVE debrief

CVE-2026-34611 WWBN CVE debrief

A cross-site request forgery vulnerability exists in AVideo versions 26.0 and prior. The vulnerability is due to the lack of CSRF token validation in the objects/emailAllUsers.json.php endpoint, which allows administrators to send HTML emails to all registered users. An attacker can exploit this vulnerability by luring an administrator to a malicious page, allowing the attacker to send arbitrary HTML emails to all users on the platform. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM.

Vendor
WWBN
Product
AVideo
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-31
Original CVE updated
2026-07-24
Advisory published
2026-03-31
Advisory updated
2026-07-24

Who should care

Administrators and users of AVideo versions 26.0 and prior should be aware of this vulnerability and take steps to mitigate it. This vulnerability could allow an attacker to send spam or phishing emails to all registered users of the platform. Operators, platform administrators, and security teams should review the vulnerability and implement necessary mitigations.

Technical summary

The AVideo endpoint objects/emailAllUsers.json.php allows administrators to send HTML emails to every registered user on the platform. However, the endpoint does not validate a CSRF token, making it vulnerable to cross-site request forgery attacks. An attacker who lures an admin to a malicious page can send an arbitrary HTML email to every user on the platform, appearing to originate from the instance's legitimate SMTP address. The vulnerability affects AVideo versions 26.0 and prior.

Defensive priority

Medium

Recommended defensive actions

  • Verify and apply vendor patches or updates
  • Implement CSRF token validation for the affected endpoint
  • Monitor for suspicious email activity
  • Restrict access to the affected endpoint
  • Educate administrators on the importance of secure browsing practices
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-03-31T21:16:31.297Z and was last modified on 2026-07-24T20:10:00.147Z. The NVD entry is currently Analyzed. The vulnerability affects AVideo versions 26.0 and prior. There are no publicly available patches at the time of publication. The CVE record was sourced from nvd_modified.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-34611 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-34611

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

  • CVE-2026-34611 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-34611

    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.