The vulnerability CVE-2020-1951 explicitly mentions PSDParser as the affected component, with an infinite loop caused by malformed PSD files. The CWE-835 classification indicates a loop with an unreachable exit condition. While the exact code isn't shown, the PSDParser's parse method is the entry point for processing PSD files and would logically contain the loop structure responsible for iterating through file segments. The fix in version 1.24 likely added validation checks for loop termination conditions when reading file metadata.