CVE-2021-26038 json
[20210704] - Core - Privilege escalation through com_installer
published 2021-07-07 5 y ago modified 2026-09-08 2 mo ago also BIT-joomla-2021-26038 , EUVD-2021-12861
- cvss
- 7.5
- 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 62%
- public exploits
- 0
- none known
Summary
An issue was discovered in Joomla! 2.5.0 through 3.9.27. Install action in com_installer lack the required hardcoded ACL checks for superusers. A default system is not affected cause the default ACL for com_installer is limited to super users already.
Exploit prediction
1.00% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | joomla | >=2.5.0, <=3.9.27 |
no fix listed |
Affected products
- Joomla! Project Joomla! CMS
Classification
- Weakness
-
- CWE-754 Improper Check for Unusual or Exceptional Conditions
References
Sources
- CVE List CVE-2021-26038
- NVD CVE-2021-26038
- OSV BIT-joomla-2021-26038
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