5.3

CVE-2021-26029: joomla! project joomla! cms

CVSS: 5.3v3.1MediumModified
Published 04-03-2021Last modified 25-02-2026
Open JSON

Vulnerability summary

CVE-2021-26029 is a medium (CVSS 5.3) vulnerability in joomla! project joomla! cms. EPSS estimates a 1.00% chance of exploitation in the next 30 days, higher than 62.5% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
1.00%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 04-03-2021
    PublishedVulnerability first disclosed.
  2. 25-02-2026
    Last modifiedVulnerability information updated.

Description

An issue was discovered in Joomla! 1.6.0 through 3.9.24. Inadequate filtering of form contents could allow to overwrite the author field.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.00%

Chance of exploitation in the next 30 days

Percentile

63%

Versus all other CVEs

30-day change

+0.03 pp

From 0.97% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.00%

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

No weakness data has been published for this record.

Affected systems

Joomla1 product
Joomla! project1 product

2 vendors · 2 products

References

1 links