CVE-2020-28208

Exp

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

Published: 2021-01-08 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-28208 is rated High Exploit Risk (66/100): CVSS Medium severity, with high exploitation likelihood (EPSS 44.09%, 98th percentile). 6 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2020-28208

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-28208

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-13 48.44% 44.09% -4.35%
2 2026-05-10 46.31% 48.44% +2.12%
3 2026-05-01 — 46.31% —

Full EPSS history (43 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-28208

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-28208

Affected software / configurations for CVE-2020-28208

Vendor Product Version Raw CPE
rocket.chat rocket.chat <= 3.9.1 cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*

References for CVE-2020-28208

URL Tags
http://packetstormsecurity.com/files/160845/Rocket.Chat-3.7.1-Email-Address-Enumeration.html Exploit Third Party Advisory VDB Entry
http://seclists.org/fulldisclosure/2021/Jan/32 Broken Link Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Jan/43 Broken Link Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/07/1 Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/08/1 Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/13/1 Exploit Mailing List Third Party Advisory
https://trovent.github.io/security-advisories/TRSA-2010-01/TRSA-2010-01.txt Exploit Third Party Advisory
https://trovent.io/security-advisory-2010-01 Exploit Third Party Advisory
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