What’s Vulnerable › Vulnerabilities

CVE-2020-27687

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-12-18 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• ThingsBoard: before 3.2 — fixed in 3.2

How to fix

Upgrade to a fixed version: ThingsBoard 3.2. Check the vendor advisory for mitigations.

References

• https://gist.github.com/vin01/26a8bb13233acd9425e7575a7ad4c936
• https://github.com/thingsboard/thingsboard/commits/master
• https://gist.github.com/vin01/26a8bb13233acd9425e7575a7ad4c936
• https://github.com/thingsboard/thingsboard/commits/master

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