CVE-2021-41038

CVE-2021-41038 is a medium-severity vulnerability in Eclipse Theia with a CVSS 3.x base score of 6.1. 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-940.

Key facts

Description

In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().

Frequently asked questions

What is CVE-2021-41038?
In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().
How severe is CVE-2021-41038?
CVE-2021-41038 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-41038 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-2021-41038?
CVE-2021-41038 affects Eclipse Theia. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-41038?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41038 published?
CVE-2021-41038 was published on 2021-11-10 and last updated on 2026-06-17.

References

Affected products (1)

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