Threat Intelligence / CVE / CVE-2026-48907

CVE-2026-48907 — joomlacontenteditor.net Joomla Content Editor (JCE) extension for Joomla

CISA KEV
CVSS v3.1 9.8 (CRITICAL) · CVSS v4.0 10 · EPSS 80.4% (higher than 99.5% of all scored CVEs) · Priority 9/10 · Published 2026-06-05

As of 2026-06-20, CVE-2026-48907 is a CRITICAL-severity vulnerability in joomlacontenteditor.net Joomla Content Editor (JCE) extension for Joomla, CVSS v3.1 9.8, EPSS 80.4% (99.5th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-06-16), with a US federal remediation deadline of 2026-06-19. Threadlinqs Intelligence links 4 tracked threat campaigns to CVE-2026-48907, most recently “CVE-2026-48939 & CVE-2026-56291: Perfect-10 Joomla Extension Bugs (iCagenda, Balbooa Forms) Actively Exploited, Added to CISA KEV”.

Last updated: 2026-06-20

What is CVE-2026-48907?

A vulnerability in the JCE editor extension for Joomla allows the creation of new editor profiles for unauthenticated users, ultimately resulting in PHP code upload and execution.

The record classifies CVE-2026-48907 under weakness class CWE-284. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 100 days ago.

Severity and exploitation probability

CVSS v3.1 base score
9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0 base score
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
EPSS (FIRST)
80.4% probability of exploitation in the next 30 days, higher than 99.5% of all scored CVEs
CISA KEV
Listed since 2026-06-16, federal remediation deadline 2026-06-19
Threadlinqs priority
9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published
2026-06-05, last modified 2026-06-20

Is CVE-2026-48907 being exploited?

CISA added CVE-2026-48907 to the Known Exploited Vulnerabilities catalog on 2026-06-16, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-06-19 under BOD 22-01. Weaponised exploit code for CVE-2026-48907 is publicly available. 10 public proof-of-concept repositories are tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (http/cves/2026/CVE-2026-48907.yaml). It currently carries a trending score of 66 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-48907

Vendor advisory: https://www.joomlacontenteditor.net/news/jce-security-update-and-a-free-patch-for-older-sites. Because CVE-2026-48907 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-06-19. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2026-48907

4 tracked threats in the Threadlinqs corpus reference CVE-2026-48907, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Issue tracking and product pages

Full detection coverage & IOCs for threats exploiting CVE-2026-48907 are available via the Threadlinqs MCP server (Purple tier). View plans →

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