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CVE-2021-23718

25
FAUCET Score

CVE-2021-23718 describes a Server-Side Request Forgery (SSRF) vulnerability in the ssrf-agent package prior to version 1.0.5, stemming from insufficient validation of private IP addresses within the defaultIpChecker function. This high-severity vulnerability (CVSS 7.5) allows unauthenticated attackers to potentially access internal network resources, leading to high confidentiality impact. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.5CPE matchmatch criteria
cpe:2.3:a:ssrf-agent_project:ssrf-agent:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.56%
Probability of exploitation in next 30 days
EPSS Percentile
72.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0156 is in the 55th percentile among its peer group of 51,553 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (1)

npmpatch availablevia ghsa
Product: ssrf-agentFixed in: 1.0.5

Vendor Advisories (1)

npmGHSA-6gww-qpm6-mc2gmedium

Server-Side Request Forgery in ssrf-agent

Dec 2, 2021

References

github.com / welefen/ssrf-agent/blob/cec2b85fe8886ad6926a247a3e059d8369ec022b/index.js%23L13
Broken LinkThird Party Advisory
security.netapp.com / advisory/ntap-20211203-0005
Third Party Advisory
snyk.io / vuln/SNYK-JS-SSRFAGENT-1584362
ExploitThird Party Advisory