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No exploitation reportedFix available

CVE-2021-23772

No exploitation reported by the sources we read.

  • Published2021-12-24
  • WeaknessCWE-59

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

This affects all versions of package github.com/kataras/iris; all versions of package github.com/kataras/iris/v12. The unsafe handling of file names during upload using UploadFormFiles method may enable attackers to write to arbitrary locations outside the designated target folder.

Timeline

dates in UTC
  1. 2021-12-2412:15CVE publishedNVD

Versions per branch

OSV · NVD
kataras/iris
BranchAffectedFixed in
0.0≤ 0.0.2no fix published
kataras/iris
BranchAffectedFixed in
12.2< 12.2.0-alpha812.2.0-alpha8
Iris-go irisversion to verify
BranchAffectedFixed in
12.1≤ 12.1.8no fix published
12.2= 12.2.0no fix published

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

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2021-23772 Red Hat Product Security

    kataras/iris: unsafe handling of file names during upload using UploadFormFiles method may allow attackers to write to arbitrary locations outside the designated target folder

Full record on NVD

Fix

Advisories and patches

Detection

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

Sources

  • CNACVSS 3.17.5known since 2026-10-23
  • NVDCVSS 3.18.8read 2026-10-23
  • NVDCVSS 2.06.8read 2026-10-23
  • NVDweakness (CWE)CWE-59read 2026-10-23
  • FIRST EPSSEPSS score1.9 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2022-01-05

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2021-12-24
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-jcxc-rh6w-wf49

Frequently asked questions

What is CVE-2021-23772?

This affects all versions of package github.com/kataras/iris; all versions of package github.com/kataras/iris/v12. The unsafe handling of file names during upload using UploadFormFiles method may enable attackers to write to arbitrary locations outside the designated target folder.

Is CVE-2021-23772 actively exploited?

Active exploitation of CVE-2021-23772 has not been confirmed. Its EPSS score was 1.9% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-23772?

CVE-2021-23772 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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