CVE-2020-12137: canonical ubuntu_linux Cross-site Scripting
Vulnerability summary
CVE-2020-12137 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in canonical ubuntu_linux. EPSS estimates a 2.29% chance of exploitation in the next 30 days, higher than 82.9% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 6 · Related 5Timeline
- 24-04-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
GNU Mailman 2.x before 2.1.30 uses the .obj extension for scrubbed application/octet-stream MIME parts. This behavior may contribute to XSS attacks against list-archive visitors, because an HTTP reply from an archive web server may lack a MIME type, and a web browser may perform MIME sniffing, conclude that the MIME type should have been text/html, and execute JavaScript code.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · UbuntuEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
2.29%
Chance of exploitation in the next 30 days
Percentile
83%
Versus all other CVEs
30-day change
0.00 pp
From 2.29% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat3 products
- mailman< 3:2.1.29-10.module+el8.3.0+6860+8e47d84b
- mailman-debuginfo< 3:2.1.29-10.module+el8.3.0+6860+8e47d84b
- mailman-debugsource< 3:2.1.29-10.module+el8.3.0+6860+8e47d84b
Debian2 products
- mailman< 1:2.1.23-1+deb9u5 | < 1:2.1.29-1+deb10u1 | < 1:2.1.18-2+deb8u5
- debian_linuxEOL9.0 | 10.0 | 8.0
Opensuse2 products
- backports_sle15.0:sp2
- leapEOL15.2
Suse2 products
- mailman&distro=SUSE Linux Enterprise Point of Sale 11 SP3< 2.1.15-9.6.20.1
- mailman&distro=SUSE Linux Enterprise Server 11 SP4-LTSS< 2.1.15-9.6.20.1
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04
Fedoraproject1 product
- fedoraEOL31 | 32
Gnu1 product
- mailman≥ 2.0, < 2.1.30
Ubuntu1 product
- mailman< 1:2.1.20-1ubuntu0.4 | < 1:2.1.26-1ubuntu0.1 | < 1:2.1.29-1ubuntu3.1
8 vendors · 13 products
References
31 links- www.openwall.com/lists/oss-security/2020/02/24/2X Refsource MISCREPORTMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2020/02/24/3X Refsource MISCREPORTMailing ListThird Party Advisory
- bazaar.launchpad.net/~mailman-coders/mailman/2.1/view/head:/NEWSX Refsource MISCREPORTThird Party Advisory
- www.openwall.com/lists/oss-security/2020/04/24/3Mailing ListX Refsource MLISTREPORTThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/05/msg00002.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00047.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
Show all 31 references
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00063.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
