How severe is CVE-2021-31899?

CVE-2021-31899 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-2021-31899 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31899?

CVE-2021-31899 affects Jetbrains Code With Me. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31899?

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-2021-31899 published?

CVE-2021-31899 was published on 2021-05-11 and last updated on 2026-06-17.

CVE-2021-31899

CVE-2021-31899 is a high-severity vulnerability in Jetbrains Code With Me 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.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Jetbrains Code With Me
Published: 2021-05-11
Last modified: 2026-06-17

Description

In JetBrains Code With Me bundled to the compatible IDEs before version 2021.1, the client could execute code in read-only mode.

Frequently asked questions

What is CVE-2021-31899?: In JetBrains Code With Me bundled to the compatible IDEs before version 2021.1, the client could execute code in read-only mode.
How severe is CVE-2021-31899?: CVE-2021-31899 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-2021-31899 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31899?: CVE-2021-31899 affects Jetbrains Code With Me. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31899?: 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-2021-31899 published?: CVE-2021-31899 was published on 2021-05-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jetbrains:code_with_me:*:*:*:*:*:*:*:*

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