How severe is CVE-2022-21122?

CVE-2022-21122 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-21122 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-21122?

CVE-2022-21122 affects Metarhia Metacalc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-21122?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2022-21122 published?

CVE-2022-21122 was published on 2022-06-08 and last updated on 2026-06-17.

CVE-2022-21122

CVE-2022-21122 is a critical-severity vulnerability in Metarhia Metacalc with a CVSS 3.x base score of 9.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
CVSS v2: 7.5
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Metarhia Metacalc
Published: 2022-06-08
Last modified: 2026-06-17

Description

The package metacalc before 0.0.2 are vulnerable to Arbitrary Code Execution when it exposes JavaScript's Math class to the v8 context. As the Math class is exposed to user-land, it can be used to get access to JavaScript's Function constructor.

Frequently asked questions

What is CVE-2022-21122?: The package metacalc before 0.0.2 are vulnerable to Arbitrary Code Execution when it exposes JavaScript's Math class to the v8 context. As the Math class is exposed to user-land, it can be used to get access to JavaScript's Function constructor.
How severe is CVE-2022-21122?: CVE-2022-21122 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-21122 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-21122?: CVE-2022-21122 affects Metarhia Metacalc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-21122?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-21122 published?: CVE-2022-21122 was published on 2022-06-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:metarhia:metacalc:*:*:*:*:*:*:*:*

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