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Public proof of concept

CVE-2020-29238

A public proof of concept exists; no exploitation attested.

  • Published2021-03-10
  • WeaknessCWE-190

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An integer buffer overflow in the Nginx webserver of ExpressVPN Router version 1 allows remote attackers to obtain sensitive information when the server running as reverse proxy via specially crafted request.

Timeline

dates in UTC
  1. 2021-04-13Exploit-DB entryExploit-DB

Versions per branch

NVD
Expressvpn
BranchAffectedFixed in
1.0= 1.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

read 2026-11-04 22:56 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-49760
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2021-03-10
Last Modified
2026-07-09
NVD status
Modified
GitHub Advisory
GHSA-647h-v8f6-577g

Frequently asked questions

What is CVE-2020-29238?

An integer buffer overflow in the Nginx webserver of ExpressVPN Router version 1 allows remote attackers to obtain sensitive information when the server running as reverse proxy via specially crafted request.

Is CVE-2020-29238 actively exploited?

Active exploitation of CVE-2020-29238 has not been confirmed. Its EPSS score was 16.5% on 2026-11-04, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-29238?

CVE-2020-29238 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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Sources for this record