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CVE-2018-16604

23
FAUCET Score

CVE-2018-16604 describes a critical vulnerability in Nibbleblog v4.0.5, allowing authenticated administrators to execute arbitrary PHP code. An attacker, possessing valid admin credentials, can achieve this by manipulating their username field, which is then directly evaluated as PHP code. This vulnerability carries a CVSS score of 7.2 (HIGH), indicating that it can be exploited remotely with low complexity, leading to complete compromise of confidentiality, integrity, and availability. While no active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion has been observed, the potential for severe impact necessitates prompt patching.

Impacted Technologies

VendorProductVersion(s)CPE
4.0.5CPE matchmatch criteria
cpe:2.3:a:nibbleblog:nibbleblog:4.0.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.53%
Probability of exploitation in next 30 days
EPSS Percentile
72.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-23
Model: v2026.06.15
This CVE's current EPSS score of 0.0153 is in the 66th percentile among its peer group of 5,530 CVEs.

Social Chatter

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

github.com / dignajar/nibbleblog/issues/131
ExploitThird Party Advisory