How severe is CVE-2022-0323?

CVE-2022-0323 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-0323 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-0323?

CVE-2022-0323 affects Mustache Project Mustache. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-0323?

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

When was CVE-2022-0323 published?

CVE-2022-0323 was published on 2022-01-21 and last updated on 2026-06-17.

CVE-2022-0323

CVE-2022-0323 is a high-severity vulnerability in Mustache Project Mustache with a CVSS 3.x base score of 8.8. 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: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Mustache Project Mustache
Published: 2022-01-21
Last modified: 2026-06-17

Description

Improper Neutralization of Special Elements Used in a Template Engine in Packagist mustache/mustache prior to 2.14.1.

Frequently asked questions

What is CVE-2022-0323?: Improper Neutralization of Special Elements Used in a Template Engine in Packagist mustache/mustache prior to 2.14.1.
How severe is CVE-2022-0323?: CVE-2022-0323 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-0323 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-0323?: CVE-2022-0323 affects Mustache Project Mustache. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-0323?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-0323 published?: CVE-2022-0323 was published on 2022-01-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mustache_project:mustache:*:*:*:*:*:php:*:*

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