How severe is CVE-2020-27224?

CVE-2020-27224 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-27224 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-2020-27224?

CVE-2020-27224 affects Eclipse Theia. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-27224?

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-2020-27224 published?

CVE-2020-27224 was published on 2021-02-24 and last updated on 2026-06-17.

CVE-2020-27224

CVE-2020-27224 is a critical-severity vulnerability in Eclipse Theia with a CVSS 3.x base score of 9.6. 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-79.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
CVSS v2: 9.3
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Eclipse Theia
Published: 2021-02-24
Last modified: 2026-06-17

Description

In Eclipse Theia versions up to and including 1.2.0, the Markdown Preview (@theia/preview), can be exploited to execute arbitrary code.

Frequently asked questions

What is CVE-2020-27224?: In Eclipse Theia versions up to and including 1.2.0, the Markdown Preview (@theia/preview), can be exploited to execute arbitrary code.
How severe is CVE-2020-27224?: CVE-2020-27224 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-27224 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-2020-27224?: CVE-2020-27224 affects Eclipse Theia. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-27224?: 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-2020-27224 published?: CVE-2020-27224 was published on 2021-02-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:eclipse:theia:*:*:*:*:*:*:*:*

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