How severe is CVE-2021-41277?

CVE-2021-41277 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2021-41277?

Affected package information for CVE-2021-41277 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2021-41277?

Upgrade the affected component to the fixed release for CVE-2021-41277, or apply your distribution's backported patch — distro builds are often patched at an older version number, so check your vendor's advisory rather than the upstream version alone.

How do I detect CVE-2021-41277 in my code and dependencies?

Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

How do I mitigate CVE-2021-41277 if there is no patch (or I can't update yet)?

Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Is CVE-2021-41277 actively exploited in the wild?

Yes. There are 13 known exploit references for CVE-2021-41277, including 8 in-the-wild exploitations 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-2021-41277?

CVE-2021-41277 has an EPSS (Exploit Prediction Scoring System) score of 97.2%, placing it in the 100th 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. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2021-41277 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2021-41277 (Metabase GeoJSON API Local File Inclusion Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2024-11-12. CISA required all US federal civilian agencies to remediate this vulnerability by 2024-12-03. The required action was: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2021-41277?

CVE-2021-41277 is classified as Information Exposure (CWE-200), Path Traversal (CWE-22). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Is there exploit tooling available for CVE-2021-41277?

A Nuclei detection template exists for CVE-2021-41277, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2021-41277 published, and has it been updated?

CVE-2021-41277 was published on November 17, 2021 and was last updated on October 20, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🛡️

CISA KEV · ACTIVELY EXPLOITED

HIGH severity

CVE-2021-41277 — metabase

HIGHFix: metabase/metabase@042a36e

CVE-2021-41277 is a high-severity (CVSS 7.5) Information Exposure vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2024-11-12) — treat it as actively exploited and patch now. A fix is available — see the affected versions and patch details below.

Also known asGHSA-w73v-6p7p-fpfr

Published

Nov 17, 2021

Updated

Oct 20, 2026

Affected

1 product

Patched

See advisory

Exploits

13 known

Exploitation data as of Oct 22, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2024-11-12. Federal agencies were required to remediate by 2024-12-03.
CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2021-41277.

EPSS Exploitation Probability

via FIRST.org ↗

97.2%probability of exploitation in next 30 days

Very High Risk0.00%

Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk

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

How urgent is this, really

CVE-2021-41277 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).

Where this sits among everything scored

Of 394,415 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.

Description

Metabase is an open source data analytics platform. In affected versions a security issue has been discovered with the custom GeoJSON map (admin->settings->maps->custom maps->add a map) support and potential local file inclusion (including environment variables). URLs were not validated prior to being loaded. This issue is fixed in a new maintenance release (0.40.5 and 1.40.5), and any subsequent release after that. If you’re unable to upgrade immediately, you can mitigate this by including rules in your reverse proxy or load balancer or WAF to provide a validation filter before the application.

Affected Products

1 product · 10 configurations

Application

metabasemetabase

10 versions

0.40.00.40.10.40.20.40.30.40.41.40.01.40.11.40.21.40.31.40.4

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.