CVE-2020-1946: Apache SpamAssassin has an OS Command Injection vulnerability
Vulnerability summary
CVE-2020-1946 is a high (CVSS 10.0) vulnerability in apache software foundation apache spamassassin. EPSS estimates a 6.13% chance of exploitation in the next 30 days, higher than 93.4% of scored vulnerabilities.
Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 6% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 5Timeline
- 25-03-2021PublishedVulnerability first disclosed.
- 13-02-2025Last modifiedVulnerability information updated.
Description
In Apache SpamAssassin before 3.4.5, malicious rule configuration (.cf) files can be configured to run system commands without any output or errors. With this, exploits can be injected in a number of scenarios. In addition to upgrading to SA version 3.4.5, users should only use update channels or 3rd party .cf files from trusted places.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
6.13%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
No change 0.00 pp
From 6.13% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Mageia4 products
- spamassassin< 3.4.5-1.mga7
- spamassassin-rules< 3.4.5-1.mga7
- spamassassin< 3.4.5-1.mga8
- spamassassin-rules< 3.4.5-1.mga8
Redhat3 products
- spamassassin< 0:3.4.4-4.el8
- spamassassin-debuginfo< 0:3.4.4-4.el8
- spamassassin-debugsource< 0:3.4.4-4.el8
Debian2 products
- spamassassin< 3.4.2-1+deb10u3 | < 3.4.2-1~deb9u4 | < 3.4.5~pre1-1
- debian_linuxEOL9.0 | 10.0
Alpine1 product
- spamassassin< 3.4.5-r0
Apache1 product
- spamassassin< 3.4.5
Apache software foundation1 product
- apache spamassassin≥ Apache SpamAssassin, < 3.4.5
Fedoraproject1 product
- fedoraEOL32 | 33 | 34
Ubuntu1 product
- spamassassin< 3.4.2-0ubuntu0.16.04.5 | < 3.4.2-0ubuntu0.18.04.5 | < 3.4.4-1ubuntu1.1 | < 3.4.2-0ubuntu0.14.04.1+esm3
8 vendors · 14 products
References
25 links
- lists.debian.org/debian-lts-announce/2021/04/msg00000.htmlMailing ListX Refsource MLISTThird Party Advisory
