CVE-2026-78079Network attack vectorHinoki check available

Open redirect via unchecked Base64 return URL

Published Aug 31, 2026 · Updated Sep 1, 2026

Open redirect in JoomShaper Helix Ultimate 1.0 through 2.2.9 allows remote attackers to send users to external sites via crafted return values. The admin-login flow Base64-decodes helixreturn and redirects to the resolved URL without first requiring Uri::isInternal to approve it. No authentication is required, but a user must follow the crafted login URL and complete the login flow before the browser leaves the site.

CVSS severity5.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Open redirect in JoomShaper Helix Ultimate 1.0 through 2.2.9 allows remote attackers to send users to external sites via crafted return values. The admin-login flow Base64-decodes helixreturn and redirects to the resolved URL without first requiring Uri::isInternal to approve it. No authentication is required, but a user must follow the crafted login URL and complete the login flow before the browser leaves the site.

The record

CVE
CVE-2026-78079
Published
Aug 31, 2026
Updated
Sep 1, 2026
Vendor
JoomShaper
Product
Helix Ultimate
Classifications
CWE-601, CAPEC-178
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0-2.2.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

JoomShaper · Helix Ultimateversion=1.0-2.2.9

Published CVSS scores

5.3Joomla ProjectCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
CAPEC-178Cross-Site Flashing

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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