Cybersecurity researchers have disclosed a critical vulnerability in the Open VSX Registry (“open-vsx[.]org”) that, if successfully exploited, could have enabled attackers to take control of the entire Visual Studio Code extensions marketplace, posing a severe supply chain risk.

“This vulnerability provides attackers full control over the entire extensions marketplace, and in turn, full control over millions of developer machines,” Koi Security researcher Oren Yomtov said. “By exploiting a CI issue a malicious actor could publish malicious updates to every extension on Open VSX.”

Following responsible disclosure on May 4, 2025, multiple rounds of fixes were proposed by the maintainers, before a final patch was deployed on June 25.

“The list of threats that ClickFix attacks lead to is growing by the day, including infostealers, ransomware, remote access trojans, cryptominers, post-exploitation tools, and even custom malware from nation-state-aligned threat actors,” Jiří Kropáč, Director of Threat Prevention Labs at ESET, said.

ClickFix has become a widely popular and deceptive method that employs bogus error messages or CAPTCHA verification checks to entice victims into copying and pasting a malicious script into either the Windows Run dialog or the Apple macOS Terminal app, and running it.

The Slovak cybersecurity company said the highest volume of ClickFix detections are concentrated around Japan, Peru, Poland, Spain, and Slovakia.

North Korean hackers exploit npm packages to deploy multi-stage malware, targeting job-seeking developers

Chrome and Yandex zero-days exploited to deploy Trinper backdoor via phishing; Russian entities targeted.