# JCE (com_jce) below 2.9.99.6 - Unauthenticated Arbitrary File Upload (RCE) and Directory Traversal [Joomla Vulnerability Database](https://mysites.guru/vulnerabilities/)/CVE-2026-48907 CVE-2026-48907CriticalCVSS 10.0CVE published 5 June 2026Added to mySites.guru 8 June 2026 # JCE (com\_jce) below 2.9.99.6 - Unauthenticated Arbitrary File Upload (RCE) and Directory Traversal JCE versions before 2.9.99.6 are affected by critical security issues, including an unauthenticated arbitrary file upload via editor profile upload that can lead to remote code execution and full server compromise, an authenticated authorisation bypass where a user could reach an editor profile they were not assigned to, and a directory traversal that listed folder contents outside the configured directory. Both JCE Core and JCE Pro are affected on Joomla 3, 4, 5 and 6. Update to 2.9.99.6 or later via the Joomla Update Manager. Copy citation ## Is my site affected? - **Affected** - JCE from 2.7.0 up to but not including 2.9.99.6 - **Fixed in** - 2.9.99.6 - **What to do** - Update JCE to 2.9.99.6 for this flaw, or to 2.9.99.10 or later, which no rule we check matches. [Check whether your sites are affected](https://mysites.guru/free-audit/) ## How CVE-2026-48907 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. 5 June 2026CVE-2026-48907 record published by its CNA 2. 8 June 2026mySites.guru check added for JCE (from 2.7.0 up to but not including 2.9.99.6) 3. 8 June 2026[We published: JCE Pro 2.9.99.6 Is a Hardening Release After a Full Audit of Joomla's Most-Installed Editor](https://mysites.guru/blog/jce-pro-2-9-99-6-security-update/) ## Rule details Critical[CVE-2026-48907](https://mysites.guru/vulnerabilities/CVE-2026-48907/)2026-06-08 [JCE](https://mysites.guru/vulnerabilities/jce/) Affected versions: ≥ 2.7.0 and < 2.9.99.6 Full advisory: [our disclosure post](https://mysites.guru/blog/jce-pro-2-9-99-6-security-update/) ## Our disclosure post [![JCE Pro 2.9.99.6 Is a Hardening Release After a Full Audit of Joomla's Most-Installed Editor](https://mysites.guru/_astro/jce-pro-2-9-99-6-security-update.COdT_Jlc_Z2nDmFC.webp) ### JCE Pro 2.9.99.6 Is a Hardening Release After a Full Audit of Joomla's Most-Installed Editor JCE Pro 2.9.99.6 follows a four-day security audit of the editor, narrowing entry points and hardening input validation. Recommended for every JCE site. 8 Jun 2026 ](https://mysites.guru/blog/jce-pro-2-9-99-6-security-update/) ## Other vulnerabilities in JCE Updating for CVE-2026-48907 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extension. ### [JCE](https://mysites.guru/vulnerabilities/jce/) Latest safe version: 2.9.99.10 - [CVE-2015-7339](https://mysites.guru/vulnerabilities/CVE-2015-7339/) High, from 2.5.0 up to and including 2.5.2 - [CVE-2026-65891](https://mysites.guru/vulnerabilities/CVE-2026-65891/) Medium, from 2.9.99.6 up to but not including 2.9.99.10 ## References - [CVE-2026-48907 on cve.org (the official CVE record)](https://www.cve.org/CVERecord?id=CVE-2026-48907) - [CVE-2026-48907 in the NIST National Vulnerability Database](https://nvd.nist.gov/vuln/detail/CVE-2026-48907) - [JCE Pro 2.9.99.6 Is a Hardening Release After a Full Audit of Joomla's Most-Installed Editor](https://mysites.guru/blog/jce-pro-2-9-99-6-security-update/) ## CVE-2026-48907 questions Show all Which versions are affected by CVE-2026-48907? [CVE-2026-48907](https://mysites.guru/vulnerabilities/CVE-2026-48907/) affects JCE from 2.7.0 up to but not including 2.9.99.6. The fix is in 2.9.99.6. How do I fix CVE-2026-48907? Update JCE to 2.9.99.6 for this flaw, or to 2.9.99.10 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-2026-48907? 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.