CVE-2018-17855

HIGHNVD 8.88.8—

8.8

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 v3: 8.8
EG Score: 8.8(medium)
EPSS: 45.5%
KEV: Not listed

Published

October 9, 2018

Last Modified

November 21, 2024

References (6)

cve@mitrehttp://www.securityfocus.com/bid/105559
cve@mitrehttp://www.securitytracker.com/id/1041914
cve@mitrehttps://developer.joomla.org/security-centre/754-20181004-core-acl-violation-in-com-users-for-the-admin-verification
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/105559
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1041914
af854a3a-2127-422b-91ae-364da2661108https://developer.joomla.org/security-centre/754-20181004-core-acl-violation-in-com-users-for-the-admin-verification

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-269Improper Privilege Management

Data Freshness Timeline

(refreshed 10× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 02:20 UTCEG score recompute
2026-05-28 02:20 UTCGHSA enrichment
2026-05-27 21:05 UTCOSV refresh
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-17855?

CVE-2018-17855 is a high vulnerability published on October 9, 2018. 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.

When was CVE-2018-17855 disclosed?

CVE-2018-17855 was first published in the National Vulnerability Database on October 9, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-17855 actively exploited?

CVE-2018-17855 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 45.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-17855?

CVE-2018-17855 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2018-17855?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-17855, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2018-17855

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-17855?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)