A redmine security update has been released for Debian GNU/Linux 9 LTS to address several issues.

DLA 2658-1: redmine security update

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Debian LTS Advisory DLA-2658-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Emilio Pozuelo Monfort
May 13, 2021   https://wiki.debian.org/LTS
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Package : redmine
Version : 3.3.1-4+deb9u4
CVE ID : CVE-2019-25026 CVE-2020-36306 CVE-2020-36307 CVE-2020-36308
CVE-2021-30163 CVE-2021-30164 CVE-2021-31863 CVE-2021-31864
CVE-2021-31865 CVE-2021-31866

Several issues were found in Redmine, a project management web application,
which could lead to cross-site scripting, information disclosure, and reading
arbitrary files from the server.

For Debian 9 stretch, these problems have been fixed in version
3.3.1-4+deb9u4.

We recommend that you upgrade your redmine packages.

For the detailed security status of redmine please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/redmine

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS