# SP Page Builder (com_sppagebuilder) 4.0.0 to 6.6.1 - CVE-2026-48908 (CVSS 10.0) Unauthenticated Arbitrary File Upload (RCE) [Joomla Vulnerability Database](https://mysites.guru/vulnerabilities/)/CVE-2026-48908 CVE-2026-48908CriticalCVSS 10.0CVE published 20 June 2026Added to mySites.guru 14 June 2026 # SP Page Builder (com\_sppagebuilder) 4.0.0 to 6.6.1 - CVE-2026-48908 (CVSS 10.0) Unauthenticated Arbitrary File Upload (RCE) SP Page Builder by JoomShaper, from 4.0.0 up to and including 6.6.1, exposes an asset.uploadCustomIcon task that accepts a file with no login and no file-type check. An unauthenticated remote attacker can upload a PHP web shell to a web-served folder and execute it, giving full remote code execution (CWE-284 Improper Access Control, CVSS v4.0 10.0). This was a zero-day found being actively exploited in the wild; observed droppers read configuration.php for database credentials and insert a rogue admin user for persistence. JoomShaper shipped 6.6.2 on 14 June 2026, which gates the endpoint behind an authenticated session with component-manage permission and a valid anti-CSRF token. Update to 6.6.2 or later immediately and check the site for web shells and rogue users. The Joomla 3 branch of SP Page Builder (3.8.x and earlier) is NOT affected by this particular flaw: the controllers/asset.php file that carries the uploadCustomIcon task does not exist in that branch at all, which is why this rule starts at 4.0.0. A Joomla 3 site on SP Page Builder 3.x is still exposed to the separate addon local-file-include issue in components/com\_sppagebuilder/controller.php, and that one is closed by the Unpatched JoomShaper Security Holes tool. Copy citation ## Is my site affected? - **Affected** - SP Page Builder from 4.0.0 up to but not including 6.6.2 - **Fixed in** - 6.6.2 - **What to do** - Update SP Page Builder to 6.6.2 for this flaw, or to 6.9.1 or later, which no rule we check matches. [Check whether your sites are affected](https://mysites.guru/free-audit/) ## How CVE-2026-48908 is scored The base metrics as Joomla CNA published them, and what each one means for a site running an affected version. Threat and environmental metrics are left out: they describe a moment or a particular install rather than the flaw. 10.0 Critical CVSS 4.0, scored by Joomla CNA `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/U:Red` ### How it is reached - **AV:N Attack vector** - Network. Reachable across the internet - **AC:L Attack complexity** - Low. Nothing to work around, it just works - **AT:N Attack requirements** - None. Works against any affected install - **PR:N Privileges required** - None. No account needed - **UI:N User interaction** - None. Nobody has to be tricked into anything ### What it does to the site - **VC:H Confidentiality** - High. Everything the site holds can be read - **VI:H Integrity** - High. Data and files can be altered at will - **VA:H Availability** - High. The site can be taken down ### What it does beyond the site - **SC:H Confidentiality** - High. Data on other systems can be read - **SI:H Integrity** - High. Other systems can be altered - **SA:H Availability** - High. Other systems can be taken down ## Timeline 1. 14 June 2026mySites.guru check added for SP Page Builder (from 4.0.0 up to but not including 6.6.2) 2. 15 June 2026[We published: SP Page Builder Zero Day Is Being Used to Plant Fake Joomla Admins](https://mysites.guru/blog/sp-page-builder-zero-day-uploadcustomicon-rce/) 3. 20 June 2026CVE-2026-48908 record published by its CNA ## Rule details Critical[CVE-2026-48908](https://mysites.guru/vulnerabilities/CVE-2026-48908/)2026-06-14 [SP Page Builder](https://mysites.guru/vulnerabilities/sppagebuilder/) Affected versions: ≥ 4.0.0 and < 6.6.2 Full advisory: [our disclosure post](https://mysites.guru/blog/sp-page-builder-zero-day-uploadcustomicon-rce/) ## Our disclosure post [![SP Page Builder Zero Day Is Being Used to Plant Fake Joomla Admins](https://mysites.guru/_astro/sp-page-builder-zero-day-uploadcustomicon-rce.D5MOu152_Z2w2J37.webp) ### SP Page Builder Zero Day Is Being Used to Plant Fake Joomla Admins An unauthenticated upload in the SP Page Builder Joomla extension gives remote code execution and creates hidden Super User accounts. Fixed in 6.6.2. 15 Jun 2026 ](https://mysites.guru/blog/sp-page-builder-zero-day-uploadcustomicon-rce/) ## Other vulnerabilities in SP Page Builder Updating for CVE-2026-48908 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extension. ### [SP Page Builder](https://mysites.guru/vulnerabilities/sppagebuilder/) Latest safe version: 6.9.1 - [CVE-2026-67285](https://mysites.guru/vulnerabilities/CVE-2026-67285/) Critical, from 6.7.1 up to but not including 6.8.0 - [CVE-2026-67286](https://mysites.guru/vulnerabilities/CVE-2026-67286/) Critical, from 6.7.1 up to but not including 6.8.0 - [CVE-2026-67287](https://mysites.guru/vulnerabilities/CVE-2026-67287/) Critical, from 6.7.1 up to but not including 6.8.0 - [CVE-2026-65876](https://mysites.guru/vulnerabilities/CVE-2026-65876/) Critical, from 6.7.1 up to but not including 6.8.0 - [CVE-2026-65766](https://mysites.guru/vulnerabilities/CVE-2026-65766/) Critical, from 6.0.0 up to but not including 6.7.1 - [CVE-2026-65877](https://mysites.guru/vulnerabilities/CVE-2026-65877/) Critical, from 6.0.0 up to but not including 6.7.1 - [CVE-2026-66494](https://mysites.guru/vulnerabilities/CVE-2026-66494/) Critical, from 6.0.0 up to but not including 6.7.1 - [CVE-2026-65878](https://mysites.guru/vulnerabilities/CVE-2026-65878/) Critical, from 6.0.0 up to but not including 6.7.1 [All 17 CVEs in SP Page Builder](https://mysites.guru/vulnerabilities/sppagebuilder/) ## References - [CVE-2026-48908 on cve.org (the official CVE record)](https://www.cve.org/CVERecord?id=CVE-2026-48908) - [CVE-2026-48908 in the NIST National Vulnerability Database](https://nvd.nist.gov/vuln/detail/CVE-2026-48908) - [SP Page Builder Zero Day Is Being Used to Plant Fake Joomla Admins](https://mysites.guru/blog/sp-page-builder-zero-day-uploadcustomicon-rce/) ## CVE-2026-48908 questions Show all Which versions are affected by CVE-2026-48908? [CVE-2026-48908](https://mysites.guru/vulnerabilities/CVE-2026-48908/) affects SP Page Builder from 4.0.0 up to but not including 6.6.2. The fix is in 6.6.2. How do I fix CVE-2026-48908? Update SP Page Builder to 6.6.2 for this flaw, or to 6.9.1 or later, which no rule we check matches. Then confirm the installed version on the Joomla administrator's Extensions: Manage screen. How severe is CVE-2026-48908? Joomla CNA scores it 10.0 (Critical) under CVSS 4.0. In plain terms: reachable across the internet, no account needed and nobody has to be tricked into anything. ## Running an affected version on a site you manage? A free audit tells you which of your Joomla and WordPress sites run an affected version, which are out of date, and which have not been backed up. No card required. If a site is already compromised, [fix.mysites.guru](https://fix.mysites.guru/) is a single fixed fee per incident, usually resolved the same day. This check is part of the [mySites.guru Joomla vulnerability scanner](https://mysites.guru/joomla-vulnerability-scanner/), which reads every installed extension's version on each audit. Browse the rest of the [Joomla vulnerability database](https://mysites.guru/vulnerabilities/). Rules current as of 14 October 2026.