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TI-2021-08016 Aliases CVE-2021-26038GHSA-jg45-rw63-37ww

[20210704] - Core - Privilege escalation through com_installer

Priority LOW 35CWE-754Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

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.

Why it matters now

EPSS 0.00997 62nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Joomla!Joomla! CMS2.5.0-3.9.27—No fix listedCNA
  • Joomla! CMS VendorJoomla! Affected 2.5.0-3.9.27 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*2.5.0 – 3.9.27VulnerableJoomla!
  • cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:* Versions 2.5.0 – 3.9.27 Vulnerable ·Joomla!

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-26038
  2. 2026-10-03 Alias added: GHSA-jg45-rw63-37ww

References

Advisory 1

  • TI-2016-08118 The mailSend function in the isMail transport in PHPMailer before 5.2.18 might allow… KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-06410 SQL injection vulnerability in Joomla! 3.7.x before 3.7.1 allows attackers to execute… CVSS 3.0CRITICAL 9.8
  • TI-2016-08129 The isMail transport in PHPMailer before 5.2.20 might allow remote attackers to pass… CVSS 3.1CRITICAL 9.8
  • TI-2016-07280 The register method in the UsersModelRegistration class in controllers/user.php in the… CVSS 3.0CRITICAL 9.8
  • TI-2023-09555 [20230201] - Core - Improper access check in webservice endpoints KEVCVSS 3.1MEDIUM 5.3
  • TI-2015-07045 Joomla! 1.5.x, 2.x, and 3.x before 3.4.6 allow remote attackers to conduct PHP object… CVSS 2.0HIGH 7.5
See all 339 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences