CVE-2020-12272

Exp

OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring.

Published: 2020-04-27 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-12272 is rated High Exploit Risk (65.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.14%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.33% over the last day, indicating growing attacker interest. 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-2020-12272

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

Exploit prediction scoring system (EPSS) score for CVE-2020-12272

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 2026-06-15 0.81% 2.14% +1.33%
2 2026-02-04 1.01% 0.81% -0.21%
3 2025-11-21 — 1.01% —

Full EPSS history (22 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-12272

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:N/I:L/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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
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:N/I:P/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:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-12272

OS Trackers for CVE-2020-12272

vendor priority summary link
debian not yet assigned CVE-2020-12272 not yet assigned priority: Debian including 1 source packages (opendmarc), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-12272
ubuntu low CVE-2020-12272 low priority: Ubuntu including 1 source packages (opendmarc), 16 status rows across 16 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, trusty, upstream, xenial): not-affected 6, ignored 5, released 4, DNE 1. https://ubuntu.com/security/CVE-2020-12272

Affected software / configurations for CVE-2020-12272

Vendor Product Version Raw CPE
trusteddomain opendmarc >= 1.0.0, <= 1.3.2 cpe:2.3:a:trusteddomain:opendmarc:*:*:*:*:*:*:*:*
trusteddomain opendmarc 1.4.0 cpe:2.3:a:trusteddomain:opendmarc:1.4.0:-:*:*:*:*:*:*
trusteddomain opendmarc 1.4.0 cpe:2.3:a:trusteddomain:opendmarc:1.4.0:beta0:*:*:*:*:*:*
trusteddomain opendmarc 1.4.0 cpe:2.3:a:trusteddomain:opendmarc:1.4.0:beta1:*:*:*:*:*:*
fedoraproject fedora 33 cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
fedoraproject fedora 34 cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

References for CVE-2020-12272

cvelogic Threat Intelligence