How severe is CVE-2022-0721?

CVE-2022-0721 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2022-0721?

CVE-2022-0721 affects the following packages: microweber/microweber (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2022-0721?

Update microweber/microweber to 1.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-0721 is resolved across your whole dependency graph.

How do I detect CVE-2022-0721 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for microweber/microweber, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2022-0721 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2022-0721 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2022-0721, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2022-0721?

CVE-2022-0721 has an EPSS (Exploit Prediction Scoring System) score of 1.4%, placing it in the 73th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2022-0721?

CVE-2022-0721 is classified as CWE-215 (CWE-215). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2022-0721 published, and has it been updated?

CVE-2022-0721 was published on February 23, 2022 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘

🐘 Packagist

Not in CISA KEV

HIGH severity

CVE-2022-0721 — microweber

HIGHFix: microweber/microweber@b12e1a4

CVE-2022-0721 is a high-severity (CVSS 8.8) CWE-215 vulnerability in microweber/microweber. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for microweber/microweber — see the affected versions and patch details below.

Insertion of Sensitive Information Into Debugging Code in microweber/microweber

Also known asGHSA-mjvc-j6rv-9xj8

Published

Feb 23, 2022

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.4%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs73th percentile — riskier than 73% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

🐘microweber/microweber

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Microweber prior to 1.3 may expose sensitive information about a server and a user when running the server in debug mode.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`microweber/microweber`	all versions	1.3`composer require microweber/microweber:^1.3`

Affected Products

1 product · 1 configurations

Application

microwebermicroweber

< 1.3

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Insertion of Sensitive Information Into Debugging Code in GitHub reposit…

huntr.devNVDMar 2022

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for microweber/microweber, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update microweber/microweber to 1.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-0721 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Microweber prior to 1.3 may expose sensitive information about a server and a user when running the server in debug mode.

O3 Security · Impact-Aware SCA

Is CVE-2022-0721 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

8.8/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Raw vector

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

CWE Classification

CWE-215CWE-215

Weaponization

No Nuclei template or Metasploit module yet. 1 public proof-of-concept reference is listed on this page.

Timeline

Disclosed

Feb 23, 2022

First exploit

Mar 2, 2022

7 days after disclosure — rapid exploitation

Last updated

Oct 28, 2026

Identifiers

CVE-2022-0721

GHSA-mjvc-j6rv-9xj8

References

Advisorygithub.com · CVE 2022 0721.json Advisorynvd.nist.gov · CVE 2022 0721 Fixgithub.com · b12e1a490c79460bff019f34b2e17112249b16ec Webhuntr.dev · ae267d39 9750 4c69 be8b 4f915da089fb Packagegithub.com · microweber

Related vulnerabilities

This CVE is high severity — higher than any of the other 8 CVEs affecting microweber/microweber (highest there: moderate).

CVE-2026-12198CVE-2025-70791CVE-2025-70792CVE-2025-51504CVE-2025-51501CVE-2025-51502CVE-2025-51503CVE-2025-34076

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 28, 2026

CVE-2022-0721 — microweber

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2022-0721 in your dependencies?