CVE-2016-9838

Joomla\! vulnerability

CVSS

7.5

EPSS

14.1%

EPSS pct

96th

Exploited

No known

An issue was discovered in components/com_users/models/registration.php in Joomla! before 3.6.5. Incorrect filtering of registration form data stored to the session on a validation error enables a user to gain access to a registered user's account and reset the user's group mappings, username, and password, as demonstrated by submitting a form that targets the `registration.register` task.

Affected vendor

Joomla

Affected product

Joomla\!

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness type (CWE)

CWE-284 — Improper Access Control

Published

2016-12-16

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to integrity.

Its EPSS score of 14.1% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2016-9838

Confirm whether Joomla Joomla\! is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2016-9838.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2016-9838

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2016-9838 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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