---
title: "CVE-2026-48908: JoomShaper SP Page Builder Unrestricted Upload of File with Dangerous Type Vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-48908/
description: "CVE-2026-48908 (JoomShaper SP Page Builder): Exploited in the wild (CISA KEV). A vulnerability in SP Page Builder for Joomla allows unauthenticated users to…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-20
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-48908"
kev: true
cvss: 10
epss: 0.88512
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-48908: JoomShaper SP Page Builder Unrestricted Upload of File with Dangerous Type Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run JoomShaper SP Page Builder. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-07-07, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-07-10 ; treat that as the outer limit, not the target.
- EPSS 88.5% , percentile 99.8: FIRST’s model estimates a 88.5% chance of exploitation activity in the next 30 days, higher than 99.8% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Editorial verdict: Act now. SP Page Builder CVE-2026-48908: Exploited Joomla RCE — Any Joomla site still on SP Page Builder 6.6.1 or older should be updated today and treated as compromised, because automated attacks have been planting web shells and admin accounts since June.

## What it is

A vulnerability in SP Page Builder for Joomla allows unauthenticated users to upload arbitrary files, ultimately resulting in the upload and execution of PHP code.

## Affected products (CVE record)

- joomshaper.net SP Page Builder extension for Joomla: 1.0.0-6.6.1

## Severity

- Joomla CVSS 4.0: 10 `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`

## Exploitation

- CISA KEV: added 2026-07-07; federal due date 2026-07-10. Known ransomware use: Unknown.
- CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 88.51% probability of exploitation activity in the next 30 days; percentile 99.8.

## Sources

- [joomshaper.com](https://www.joomshaper.com/forum/question/45152)
- [extensions.joomla.org](https://extensions.joomla.org/extension/sp-page-builder/)
- [CVE.org record CVE-2026-48908](https://www.cve.org/CVERecord?id=CVE-2026-48908)
- [NVD entry CVE-2026-48908](https://nvd.nist.gov/vuln/detail/CVE-2026-48908)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48908)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk)
- [joomshaper.com](https://www.joomshaper.com/page-builder)
- [mysites.guru](https://mysites.guru/blog/sp-page-builder-zero-day-uploadcustomicon-rce/)

---
Source page: https://erroneo.us/security/cve/CVE-2026-48908/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt