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CVE-2018-16979

30
FAUCET Score

CVE-2018-16979 describes an HTTP header injection vulnerability in Monstra CMS V3.0.4, specifically within the plugins/captcha/crypt/cryptographp.php cfg parameter. This medium-severity vulnerability (CVSS 6.1) could allow an unauthenticated attacker to inject arbitrary HTTP headers, potentially leading to information disclosure or cross-site scripting, requiring user interaction. While no active exploitation or public exploit code (Metasploit, ExploitDB) has been identified, a Nuclei template exists, and there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.0.4CPE matchmatch criteria
cpe:2.3:a:monstra:monstra:3.0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.02%
Probability of exploitation in next 30 days
EPSS Percentile
86.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Nuclei: CVE-2018-16979 · Jan 8, 2023
This CVE's current EPSS score of 0.0302 is in the 94th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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 / howchen/howchen/issues/4
ExploitThird Party Advisory