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Vulnerability record · CVE-2020-28208 · published 8 January 2021

CVE-2020-28208: Rocket.chat observable discrepancy vulnerability

RRocket.Chat · Rocket.Chat

An email address enumeration vulnerability exists in the password reset function of Rocket.Chat through 3.9.1.

5.3 CVSS 3.1 Medium EPSS 11% · top 4.3% CWE-203 · Observable discrepancy
5.3CVSS 3.1 base score, v2 5.0
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
16References, 12 tagged exploit
17 Jun 2026Last modified by NVD

Description

An email address enumeration vulnerability exists in the password reset function of Rocket.Chat through 3.9.1.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/160845/Rocket.Chat-3.7.1-Email-Address-Enumeration.html ExploitThird Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2021/Jan/32 Broken LinkMailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/Jan/43 Broken LinkMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/07/1 ExploitMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/08/1 ExploitMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/13/1 ExploitMailing ListThird Party Advisory
https://trovent.github.io/security-advisories/TRSA-2010-01/TRSA-2010-01.txt ExploitThird Party Advisory
https://trovent.io/security-advisory-2010-01 ExploitThird Party Advisory
http://packetstormsecurity.com/files/160845/Rocket.Chat-3.7.1-Email-Address-Enumeration.html ExploitThird Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2021/Jan/32 Broken LinkMailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/Jan/43 Broken LinkMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/07/1 ExploitMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/08/1 ExploitMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/13/1 ExploitMailing ListThird Party Advisory
https://trovent.github.io/security-advisories/TRSA-2010-01/TRSA-2010-01.txt ExploitThird Party Advisory
https://trovent.io/security-advisory-2010-01 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-28208), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.