CVE-2021-23772: This affects all versions of package github.com/kataras/iris; all versions of package github.com/kataras/iris/

Q: How do I fix CVE-2021-23772?

iris: upgrade to newer than 12.1.8. Exact commands for each OS are on this page.

Q: Is CVE-2021-23772 being exploited?

CVE-2021-23772 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-23772 affect?

CVE-2021-23772 affects iris. Severity is high (CVSS 7.5). 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 locat

Q: How urgent is CVE-2021-23772?

Priority 51/100. High severity; Public exploit reference

This month

HIGH 7.5UPGRADE

CVE-2021-23772 is a high-severity flaw (CVSS 7.5) affecting iris. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-59
Published	2021-12-24
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: iris-go

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-12-24 12:15 UTCPublished CVE record published
2026-06-17 03:38 UTCUpdated Record last modified

iris-go iris UPGRADE

Affected: <= 12.1.8 · 12.2.0 alpha · 12.2.0 alpha2 · 12.2.0 alpha3 · 12.2.0 alpha4 · 12.2.0 alpha5

Fixed in: newer than 12.1.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy iris || rpm -q iris || iris --version

2. UPGRADE to newer than 12.1.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade iris

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade iris

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-23772?

iris: upgrade to newer than 12.1.8. Exact commands for each OS are on this page.

Is CVE-2021-23772 being exploited?

CVE-2021-23772 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-23772 affect?

CVE-2021-23772 affects iris. Severity is high (CVSS 7.5). 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 locat

How urgent is CVE-2021-23772?

Priority 51/100. High severity; Public exploit reference

Software pages

GitHub vulnerabilities

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References

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