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CVE-2016-5839

20
FAUCET Score

CVE-2016-5839 is a high-severity vulnerability affecting WordPress versions prior to 4.5.3, allowing remote attackers to bypass the sanitize_file_name protection mechanism through unspecified vectors. This network-exploitable flaw has low attack complexity and no user interaction, enabling an attacker to achieve high integrity impact without affecting confidentiality or availability. Despite its high CVSS score of 7.5, there is no known exploit code available in Metasploit, Nuclei, or ExploitDB, and it is not listed on the KEV catalog. Furthermore, the vulnerability has garnered minimal community discussion and media coverage, suggesting a low level of public awareness or active exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.5.2CPE matchmatch criteria
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.57%
Probability of exploitation in next 30 days
EPSS Percentile
83.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0257 is in the 71st percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

codex.wordpress.org / Version_4.5.3
wordpress.org / news/2016/06/wordpress-4-5-3
Vendor Advisory
debian.org / security/2016/dsa-3639
securityfocus.com / bid/91364
securitytracker.com / id/1036163
Third Party Advisory