CVE-2018-17855
If an attacker gets access to the mail account of an user who can approve admin verifications in the registration process, he can activate himself.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.90%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in Joomla! before 3.8.13. If an attacker gets access to the mail account of an user who can approve admin verifications in the registration process, he can activate himself.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.90% probability · 80th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-269
- Affected
- joomla/joomla\!
- Source
- cve@mitre.org
EPSS 1.9% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/105559Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041914Third Party Advisory, VDB Entry
- https://developer.joomla.org/security-centre/754-20181004-core-acl-violation-in-com-users-for-the-admin-verificationVendor Advisory
- http://www.securityfocus.com/bid/105559Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041914Third Party Advisory, VDB Entry
- https://developer.joomla.org/security-centre/754-20181004-core-acl-violation-in-com-users-for-the-admin-verificationVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.