YouTube ad blocker with 11 million installations and possible backdoor
Summary
Security researchers found a potential vulnerability in the Adblock for YouTube browser extension, which has more than 11 million installations. The issue involves server-controlled scriptlet rules that could allow JavaScript injection into visited pages if abused. The researchers also linked the publisher to earlier extensions removed from the Chrome Web Store for malware concerns. The developer said it will remove the unused scriptlet code and tighten host validation in an upcoming Chrome Web Store update.
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$10M to $25M