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PatchSiren cyber security CVE debrief

CVE-2026-44366 givanz CVE debrief

A stored cross-site scripting (XSS) vulnerability in Vvveb CMS allows unauthenticated attackers to inject malicious scripts via the author field in the comment submission flow. The vulnerability exists because user-supplied input is stored without sanitization and later rendered unsanitized in administrative interfaces. This affects versions prior to 1.0.8.1. The CVSS 3.1 score of 6.1 (Medium) reflects network attack vector, low attack complexity, no privileges required, user interaction required, and changed scope with low impacts to confidentiality and integrity. The vulnerability was published on 2026-05-15 and last modified on 2026-05-18.

Vendor
givanz
Product
Vvveb
CVSS
MEDIUM 6.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-15
Original CVE updated
2026-05-18
Advisory published
2026-05-15
Advisory updated
2026-05-18

Who should care

Organizations running Vvveb CMS for public-facing websites, blogs, or e-commerce stores; security teams responsible for content management platform security; web application developers implementing comment systems

Technical summary

Vvveb CMS versions prior to 1.0.8.1 contain a stored XSS vulnerability in the comment submission functionality. The author field accepts unsanitized input from unauthenticated users and stores it persistently. This stored data is subsequently rendered without proper output encoding in at least two distinct rendering contexts, enabling execution of attacker-supplied scripts. The vulnerability requires user interaction for exploitation (target user must view the rendered content) but grants the attacker execution context within the affected user's browser session.

Defensive priority

medium

Recommended defensive actions

  • Upgrade Vvveb CMS to version 1.0.8.1 or later to remediate the stored XSS vulnerability
  • Review and sanitize all user input fields in comment submission flows, particularly the author field
  • Implement Content Security Policy (CSP) headers to mitigate impact of potential XSS payloads
  • Audit existing comment data for malicious script content that may have been stored prior to patching
  • Validate output encoding in administrative interfaces where comment data is rendered

Evidence notes

Vulnerability confirmed through GitHub Security Advisory GHSA-gpmg-pcxr-9wvf. CWE-79 (Improper Neutralization of Input During Web Page Generation) identified as the underlying weakness. Fix version 1.0.8.1 explicitly mentioned in source description.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44366 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44366

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

  • CVE-2026-44366 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44366

    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.