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No exploitation reportedFix available

CVE-2021-23718

No exploitation reported by the sources we read.

  • Published2021-11-22
  • Fixed in1.0.5
  • WeaknessCWE-918

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The package ssrf-agent before 1.0.5 are vulnerable to Server-side Request Forgery (SSRF) via the defaultIpChecker function. It fails to properly validate if the IP requested is private.

Timeline

dates in UTC
  1. 2021-11-2217:15CVE publishedNVD

Versions per branch

NVD · OSV
Ssrf-agent project ssrf-agent
BranchAffectedFixed in
1.0< 1.0.51.0.5

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Ssrf-agent project ssrf-agent to 1.0.5

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.16.5known since 2026-10-23
  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • NVDweakness (CWE)CWE-918read 2026-10-23
  • FIRST EPSSEPSS score1.6 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryMODERATE2021-11-23

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2021-11-22
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-6gww-qpm6-mc2g

Frequently asked questions

What is CVE-2021-23718?

The package ssrf-agent before 1.0.5 are vulnerable to Server-side Request Forgery (SSRF) via the defaultIpChecker function. It fails to properly validate if the IP requested is private.

Is CVE-2021-23718 actively exploited?

Active exploitation of CVE-2021-23718 has not been confirmed. Its EPSS score was 1.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-23718?

CVE-2021-23718 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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