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No exploitation reportedFix available

CVE-2020-27687

No exploitation reported by the sources we read.

  • Published2020-12-18
  • Fixed in3.2
  • WeaknessCWE-20 · CWE-74

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

ThingsBoard before v3.2 is vulnerable to Host header injection in password-reset emails. This allows an attacker to send malicious links in password-reset emails to victims, pointing to an attacker-controlled server. Lack of validation of the Host header allows this to happen.

Timeline

dates in UTC
  1. 2020-12-1819:15CVE publishedNVD

Versions per branch

NVD
Thingsboard
BranchAffectedFixed in
3.2< 3.23.2

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

Fix

  1. Update Thingsboard to 3.2

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2020-12-18
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-gxgw-6q4v-hcj8

Frequently asked questions

What is CVE-2020-27687?

ThingsBoard before v3.2 is vulnerable to Host header injection in password-reset emails. This allows an attacker to send malicious links in password-reset emails to victims, pointing to an attacker-controlled server. Lack of validation of the Host header allows this to happen.

Is CVE-2020-27687 actively exploited?

Active exploitation of CVE-2020-27687 has not been confirmed. Its EPSS score was 1.5% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-27687?

CVE-2020-27687 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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Sources for this record