9.8

CVE-2026-48904: Joomla! Core - [20260514] - Privilege escalation through com_users webservice endpoints

Analyzed
Published 26-05-2026Last modified 27-05-2026

Vulnerability summary

CVE-2026-48904 is a critical (CVSS 9.8) Improper Access Control vulnerability in joomla! project joomla! cms. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 43.6% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
0.53%
0%100%
Low · +0.23 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 26-05-2026
    PublishedVulnerability first disclosed.
  2. 27-05-2026
    Last modifiedVulnerability information updated.

Description

An improper access check allows privelege escalation through the com_users group editing webservice endpoint.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

Increase +0.23 pp

From 0.29% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Joomla1 product
  • joomla\!≥ 4.0.0, < 5.4.6 | ≥ 6.0.0, < 6.1.1
Joomla! project1 product

2 vendors · 2 products

References

1 links