9.1

CVE-2021-26040: joomla! project joomla! cms Incorrect Authorization

CVSS: 9.1v3.1CriticalModified
Published 24-08-2021Last modified 25-02-2026
Open JSON

Vulnerability summary

CVE-2021-26040 is a critical (CVSS 9.1) Incorrect Authorization vulnerability in joomla! project joomla! cms. EPSS estimates a 0.94% chance of exploitation in the next 30 days, higher than 60.3% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (NVD)
EPSS score
0.94%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 24-08-2021
    PublishedVulnerability first disclosed.
  2. 25-02-2026
    Last modifiedVulnerability information updated.

Description

An issue was discovered in Joomla! 4.0.0. The media manager does not correctly check the user's permissions before executing a file deletion command.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.94%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

0.00 pp

From 0.94% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.94%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Joomla1 product
Joomla! project1 product

2 vendors · 2 products

References

1 links