Command Injection in @theia/messages

published 2021-03-12 5 y ago modified 2026-06-17 4 mo ago also GHSA-c94v-8fff-73ph , EUVD-2021-1039

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits: 0; none known

In Eclipse Theia versions up to and including 0.16.0, in the notification messages there is no HTML escaping, so Javascript code can run.

Patch / fix

fixed in 1 links 1

npm @theia/messages 1.0.0

github.com/eclipse-theia/theia#7289 pull request

Exploit prediction

0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/eclipse-theia/theia/issues/7283 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
npm	@theia/messages	<1.0.0	1.0.0

Affected products

The Eclipse Foundation Eclipse Theia

Classification

Weakness

CWE-830 Inclusion of Web Functionality from an Untrusted Source
CWE-829 Inclusion of Functionality from Untrusted Control Sphere

References

github.com /eclipse-theia/theia/pull/7289
web
github.com /eclipse-theia/theia/issues/7283
web, exploit, issue-tracking, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2021-28162
advisory
github.com /eclipse-theia/theia/blob/master/CHANGELOG.md#v100---26032020
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary