Metadata Anonymisation Toolkit (MAT) 0.6 and 0.6.1 silently fails to perform "Clean metadata" actions upon invocation from the Nautilus contextual menu, which allows context-dependent attackers to obtain sensitive information by reading a file for which cleaning had been attempted.
https://bugs.debian.org/858058
https://0xacab.org/mat/mat/issues/11527
https://0xacab.org/mat/mat/commit/94ca62a429bb6a3a5f293de26053e54bbfeea9f9
https://0xacab.org/mat/mat/commit/8f6303a1f26fe8dad83ba96ab8328dbdfa3af59a