CVE-2021-41038 json
Improper Verification of Communication Channel in @theia/plugin-ext
published 4y ago modified 4mo ago also GHSA-w6v7-w58j-pg5r , EUVD-2021-2403
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().
Patch / fix
- npm @theia/plugin-ext 1.18.0
- The Eclipse Foundation @theia/plugin-ext 1.18.0
- github.com/eclipse-theia/theia#10125 pull request
Is CVE-2021-41038 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.74% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- bugs.eclipse.org https://bugs.eclipse.org/bugs/show_bug.cgi?id=575924 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/plugin-ext | <1.18.0 |
1.18.0 |
Affected products
- The Eclipse Foundation @theia/plugin-ext
Classification
- Weakness
-
- CWE-940 Improper Verification of Source of a Communication Channel
References
-
github.com
/eclipse-theia/theia/pull/10125
web, patch, third-party-advisory
-
bugs.eclipse.org
/bugs/show_bug.cgi?id=575924
web, exploit, issue-tracking, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-41038
advisory
-
github.com
/eclipse-theia/theia
package
Sources
- CVE List CVE-2021-41038
- GitHub Advisory GHSA-w6v7-w58j-pg5r
- NVD CVE-2021-41038
Fencer Intel 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.