A mrxvt security update has been released for Fedora 33.

SECURITY: Fedora 33 Update: mrxvt-0.5.3-31.fc33

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Fedora Update Notification
FEDORA-2021-71556a5722
2021-08-02 01:06:02.549851
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Name : mrxvt
Product : Fedora 33
Version : 0.5.3
Release : 31.fc33
URL :   http://materm.sourceforge.net/wiki/Main/HomePage
Summary : A lightweight multi-tabbed terminal emulator for X
Description :
Mrxvt (previously materm) is based on 2.7.11 CVS of rxvt and aterm.

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Update Information:

Fix for CVE-2021-33477
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ChangeLog:

* Fri Jul 23 2021 Mamoru TASAKA - 0.5.3-31
- Patch for CVE-2021-33477 (bug 1961794)
* Thu Jul 22 2021 Fedora Release Engineering - 0.5.3-30
- Rebuilt for   https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild
* Tue Jan 26 2021 Fedora Release Engineering - 0.5.3-29
- Rebuilt for   https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
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References:

[ 1 ] Bug #1961796 - CVE-2021-33477 mrxvt: rxvt-unicode: possible remote code execution [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1961796
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-71556a5722' at the command
line. For more information, refer to the dnf documentation available at
  http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
  https://fedoraproject.org/keys