The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2021:1751 advisory.

  - /options/mailman in GNU Mailman before 2.1.31 allows Arbitrary Content Injection. (CVE-2020-12108)

  - GNU Mailman before 2.1.33 allows arbitrary content injection via the Cgi/private.py private archive login     page. (CVE-2020-15011)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2022:0093 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

    CVE-2020-12108:
    /options/mailman in GNU Mailman before 2.1.31 allows Arbitrary Content Injection.

    CVE-2020-12137:
    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.

    CVE-2020-15011:
    GNU Mailman before 2.1.33 allows arbitrary content injection via the Cgi/private.py private archive login     page.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for mailman to version 2.1.34 fixes the following issues :

  - The fix for lp#1859104 can result in ValueError being     thrown on attempts to subscribe to a list. This is fixed     and extended to apply REFUSE_SECOND_PENDING to     unsubscription as well. (lp#1878458)

  - DMARC mitigation no longer misses if the domain name     returned by DNS contains upper case. (lp#1881035)

  - A new WARN_MEMBER_OF_SUBSCRIBE setting can be set to No     to prevent mailbombing of a member of a list with     private rosters by repeated subscribe attempts.
    (lp#1883017)

  - Very long filenames for scrubbed attachments are now     truncated. (lp#1884456)

  - A content injection vulnerability via the private login     page has been fixed. CVE-2020-15011 (lp#1877379,     bsc#1173369)

  - A content injection vulnerability via the options login     page has been discovered and reported by Vishal Singh.
    CVE-2020-12108 (lp#1873722, bsc#1171363)

  - Bounce recognition for a non-compliant Yahoo format is     added.

  - Archiving workaround for non-ascii in string.lowercase     in some Python packages is added.

  - Thanks to Jim Popovitch, there is now a     dmarc_moderation_addresses list setting that can be used     to apply dmarc_moderation_action to mail From: addresses     listed or matching listed regexps. This can be used to     modify mail to addresses that don't accept external mail     From: themselves.

  - There is a new MAX_LISTNAME_LENGTH setting. The fix for     lp#1780874 obtains a list of the names of all the all     the lists in the installation in order to determine the     maximum length of a legitimate list name. It does this     on every web access and on sites with a very large     number of lists, this can have performance implications.
    See the description in Defaults.py for more information.

  - Thanks to Ralf Jung there is now the ability to add text     based captchas (aka textchas) to the listinfo subscribe     form. See the documentation for the new CAPTCHA setting     in Defaults.py for how to enable this. Also note that if     you have custom listinfo.html templates, you will have     to add a <mm-captcha-ui> tag to those templates to make     this work. This feature can be used in combination with     or instead of the Google reCAPTCHA feature added in     2.1.26.

  - Thanks to Ralf Hildebrandt the web admin Membership     Management section now has a feature to sync the list's     membership with a list of email addresses as with the     bin/sync_members command.

  - There is a new drop_cc list attribute set from     DEFAULT_DROP_CC. This controls the dropping of addresses     from the Cc: header in delivered messages by the     duplicate avoidance process. (lp#1845751)

  - There is a new REFUSE_SECOND_PENDING mm_cfg.py setting     that will cause a second request to subscribe to a list     when there is already a pending confirmation for that     user. This can be set to Yes to prevent mailbombing of a     third-party by repeatedly posting the subscribe form.
    (lp#1859104)

  - Fixed the confirm CGI to catch a rare TypeError on     simultaneous confirmations of the same token.
    (lp#1785854)

  - Scrubbed application/octet-stream MIME parts will now be     given a .bin extension instead of .obj. CVE-2020-12137     (lp#1886117)

  - Added bounce recognition for a non-compliant opensmtpd     DSN with Action: error. (lp#1805137)

  - Corrected and augmented some security log messages.
    (lp#1810098)

  - Implemented use of QRUNNER_SLEEP_TIME for bin/qrunner

    --runner=All. (lp#1818205)

  - Leading/trailing spaces in provided email addresses for     login to private archives and the user options page are     now ignored. (lp#1818872)

  - Fixed the spelling of the --no-restart option for     mailmanctl.

  - Fixed an issue where certain combinations of charset and     invalid characters in a list's description could produce     a List-ID header without angle brackets. (lp#1831321)

  - With the Postfix MTA and virtual domains, mappings for     the site list -bounces and -request addresses in each     virtual domain are now added to data/virtual-mailman     (-owner was done in 2.1.24). (lp#1831777)

  - The paths.py module now extends sys.path with the result     of site.getsitepackages() if available. (lp#1838866)

  - A bug causing a UnicodeDecodeError in preparing to send     the confirmation request message to a new subscriber has     been fixed. (lp#1851442)

  - The SimpleMatch heuristic bounce recognizer has been     improved to not return most invalid email addresses.
    (lp#1859011)

According to the versions of the mailman package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - /options/mailman in GNU Mailman before 2.1.31 allows     Arbitrary Content Injection.(CVE-2020-12108)

  - 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.(CVE-2020-12137)

  - GNU Mailman before 2.1.33 allows arbitrary content     injection via the Cgi/private.py private archive login     page.(CVE-2020-15011)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for mailman fixes the following issues :

Security issue fixed :

CVE-2020-12108: Fixed a content injection bug (bsc#1171363).

CVE-2020-12137: Fixed a XSS vulnerability caused by MIME type confusion (bsc#1170558).

Non-security issue fixed :

Fixed rights and ownership on /var/lib/mailman/archives (bsc#1167068).

Don't default to invalid hosts for DEFAULT_EMAIL_HOST (bsc#682920).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Debian 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-4991 advisory.

  - /options/mailman in GNU Mailman before 2.1.31 allows Arbitrary Content Injection. (CVE-2020-12108)

  - GNU Mailman before 2.1.33 allows arbitrary content injection via the Cgi/private.py private archive login     page. (CVE-2020-15011)

  - GNU Mailman before 2.1.35 may allow remote Privilege Escalation. A certain csrf_token value is derived     from the admin password, and may be useful in conducting a brute-force attack against that password.
    (CVE-2021-42096)

  - GNU Mailman before 2.1.35 may allow remote Privilege Escalation. A csrf_token value is not specific to a     single user account. An attacker can obtain a value within the context of an unprivileged user account,     and then use that value in a CSRF attack against an admin (e.g., for account takeover). (CVE-2021-42097)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5121-2 advisory.

    USN-5009-1 fixed vulnerabilities in Mailman. This update provides the corresponding updates for Ubuntu     20.04 LTS. In addition, the following CVEs were fixed:

    It was discovered that Mailman allows arbitrary content injection. An attacker could use this to inject     malicious content. (CVE-2020-12108, CVE-2020-15011)

    It was discovered that Mailman improperly sanitize the MIME content. An attacker could obtain sensitive     information by sending a special type of attachment. (CVE-2020-12137)



Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-093164 advisory.

    /options/mailman in GNU Mailman before 2.1.31 allows Arbitrary Content Injection.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
185015	Rocky Linux 8 : mailman:2.1 (RLSA-2021:1751)	Nessus	Rocky Linux Local Security Checks	2023/11/7	2023/11/7	medium
239431	TencentOS Server 3: mailman:2.1 (TSSA-2022:0093)	Nessus	Tencent Local Security Checks	2025/6/16	2025/12/5	medium
141925	openSUSE Security Update : mailman (openSUSE-2020-1707)	Nessus	SuSE Local Security Checks	2020/10/27	2024/2/13	medium
142117	EulerOS 2.0 SP5 : mailman (EulerOS-SA-2020-2256)	Nessus	Huawei Local Security Checks	2020/10/30	2024/2/13	medium
136794	SUSE SLES12 Security Update : mailman (SUSE-SU-2020:1301-1)	Nessus	SuSE Local Security Checks	2020/5/22	2024/3/12	medium
154354	Debian DSA-4991-1 : mailman - security update	Nessus	Debian Local Security Checks	2021/10/23	2023/11/28	high
154779	Ubuntu 20.04 LTS : Mailman vulnerabilities (USN-5121-2)	Nessus	Ubuntu Local Security Checks	2021/11/1	2024/10/29	high
340197	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: mailman (UTSA-2026-093164)	Nessus	Unity Linux Local Security Checks	2026/8/26	2026/8/28	medium

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