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CVE-2018-5950

23
FAUCET Score

CVE-2018-5950 describes a cross-site scripting (XSS) vulnerability in the web UI of Mailman versions prior to 2.1.26, impacting distributions like Debian, Red Hat, and Canonical. This medium-severity flaw (CVSS 6.1) allows remote attackers to inject arbitrary web script or HTML via a user-options URL, potentially leading to information disclosure or defacement. While the attack complexity is low and no authentication is required, user interaction is necessary for exploitation. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.1.26CPE matchmatch criteria
cpe:2.3:a:gnu:mailman:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.57%
Probability of exploitation in next 30 days
EPSS Percentile
90.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0457 is in the 96th percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: mailman-3:2.1.12-26.el6_9.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: mailman-3:2.1.15-26.el7_4.1
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: mailman

Vendor Advisories (1)

redhatCVE-2018-5950Moderate

mailman: Cross-site scripting (XSS) vulnerability in web UI

Jan 20, 2018

References

packetstormsecurity.com / files/159761/Mailman-2.1.23-Cross-Site-Scripting.html
ExploitThird Party AdvisoryVDB Entry
access.redhat.com / errata/RHSA-2018:0504
Third Party Advisory
access.redhat.com / errata/RHSA-2018:0505
Third Party Advisory
bugs.launchpad.net / mailman/+bug/1747209
Issue TrackingPatchThird Party Advisory
lists.debian.org / debian-lts-announce/2018/02/msg00007.html
Mailing ListThird Party Advisory
usn.ubuntu.com / 3563-1
Third Party Advisory
debian.org / security/2018/dsa-4108
Third Party Advisory
mail-archive.com / mailman-users%40python.org/msg70375.html
securityfocus.com / bid/104594
Third Party AdvisoryVDB Entry