JSLint reports “Insecure ^” for my regex — what does that mean?

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[^\s;|\\*'"!,()<>] matches any ASCII character other than the ones listed, and any non-ASCII character. Since JavaScript strings are Unicode-aware, that means every character known to Unicode. I can see a lot of potential for mischief there.

Rather than disable the warning, I would rewrite the character class to match the characters you do want to allow, as this regex from the Regular Expressions Cookbook does:

/\bhttps?:\/\/[-\w+&@#/%?=~|$!:,.;]*[\w+&@#/%=~|$]/g

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