[20210309] - Core - Inadequate filtering of form contents could allow to overwrite the author field

published 2021-03-04 5 y ago modified 2026-09-08 2 mo ago also BIT-joomla-2021-26029 , EUVD-2021-12852

cvss: 5.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits: 0; none known

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.

Patch / fix

fixed in 2

bitnami joomla 3.9.25
joomla joomla! 3.9.25

Exploit prediction

1.00% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:P/A:N
OSV	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
bitnami	joomla	>=1.6.0, <3.9.25	3.9.25

Affected products

Joomla! Project Joomla! CMS

References

developer.joomla.org /security-centre/849-20210309-core-inadequate-filtering-of-form-contents-could-allow-to-overwrite-the-author-f
vendor-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2021-26029
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary