How severe is CVE-2021-31900?

CVE-2021-31900 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-31900 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31900?

CVE-2021-31900 affects Jetbrains Code With Me. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31900?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-31900 published?

CVE-2021-31900 was published on 2021-05-11 and last updated on 2026-06-17.

CVE-2021-31900

CVE-2021-31900 is a medium-severity vulnerability in Jetbrains Code With Me with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (49th 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 IDE versions before 2021.1, a client could open a browser on a host.

Frequently asked questions

What is CVE-2021-31900?: In JetBrains Code With Me bundled to the compatible IDE versions before 2021.1, a client could open a browser on a host.
How severe is CVE-2021-31900?: CVE-2021-31900 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-31900 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31900?: CVE-2021-31900 affects Jetbrains Code With Me. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31900?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-31900 published?: CVE-2021-31900 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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