diff --git a/metadata/com.foobnix.pro.pdf.reader.yml b/metadata/com.foobnix.pro.pdf.reader.yml
index aad1df4e7d..d8abfec950 100644
--- a/metadata/com.foobnix.pro.pdf.reader.yml
+++ b/metadata/com.foobnix.pro.pdf.reader.yml
@@ -1,15 +1,20 @@
+AntiFeatures:
+  - KnownVuln
 Categories:
   - Reading
 License: GPL-3.0-or-later
 SourceCode: https://github.com/foobnix/LibreraReader
 IssueTracker: https://github.com/foobnix/LibreraReader/issues
 
-Description: Librera Reader is an application that reads PDF, EPUB, MOBI, DjVu, FB2,
-    TXT, RTF, AZW, AZW3, HTML, CBZ, CBR books on Android. Librera Reader is an easy
-    to use and highly configurable reading app that supports the most popular document
-    formats. With its simple, yet powerful interface, Librera makes document reading
-    a true pleasure. Librera even features a unique auto-scrolling, hand-free music
-    mode.
+Description: |-
+    Librera Reader is an easy to use and highly configurable reading app that
+    supports PDF, EPUB, MOBI, DjVu, FB2, TXT, RTF, AZW, AZW3, HTML, CBZ and CBR
+    formats. With its simple, yet powerful interface, Librera makes document
+    reading a true pleasure. Librera even features a unique auto-scrolling,
+    hand-free music mode.
+
+    Librera Reader uses MuPDF 1.11 which has multiple vulnerabilites:
+    https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=mupdf.
 
 RepoType: git
 Repo: https://github.com/foobnix/LibreraReader.git