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CVE-2017-16634

32
FAUCET Score

CVE-2017-16634 is a critical vulnerability affecting Joomla! versions prior to 3.8.2, allowing attackers to bypass a user's two-factor authentication. With a CVSS score of 9.8, it presents a high risk due to its network-based attack vector, low attack complexity, and potential for complete compromise of confidentiality, integrity, and availability. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.2.0, <= 3.8.1CPE matchmatch criteria
cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.40%
Probability of exploitation in next 30 days
EPSS Percentile
90.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0440 is in the 84th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

developer.joomla.org / security-centre/713-20171102-core-2-factor-authentication-bypass
PatchVendor Advisory
securityfocus.com / bid/101701
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039757
Third Party AdvisoryVDB Entry