What is CVE-2021-34436?

CVE-2021-34436 is a critical-severity vulnerability in Eclipse Theia, classified under Path Traversal. CVSS score: 9.8/10. Published 2021-09-02.

How severe is CVE-2021-34436?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Path Traversal in Eclipse Theia

CVE-2021-34436

In Eclipse Theia 0.1.1 to 0.2.0, it is possible to exploit the default build to obtain remote code execution (and XXE) via the theia-xml-extension. This extension uses lsp4xml (recently renamed to LemMinX) in order to provide language supp…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.022 (80.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Eclipse Theia
The Eclipse Foundation Theia — versions 0.1.1, 0.1.2, 0.2.0-next.28bc2735

Weakness classification (CWE)

References

emo@eclipse.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-34436?: CVE-2021-34436 is a critical-severity vulnerability in Eclipse Theia, classified under Path Traversal. CVSS score: 9.8/10. Published 2021-09-02.
How severe is CVE-2021-34436?: Critical severity. CVSS v3 base score is 9.8 out of 10.