Input validation vulnerability in Insert Special Characters 1.0.4

guzzlehttp/psr7 is a library for handling messages sent over the internet (HTTP). Previous versions of this library (before 1.8.4 and 2.1.1) had a security issue

Detected in:

Insert Special Characters fixed vulnerable versions: >= * <= 1.0.4

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Version compare shows which versions have a vulnerability. For example: >= 2.2.8 <= 2.2.21 means:

> from 2.2.8
= including 2.2.8 & 2.2.21
< to 2.2.21

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