A security researcher has found several vulnerabilities in the popular open-source Horde web email software that allow hackers to near-invisibly steal the contents of a victim's inbox.
Horde is one of the most popular free and open-source web email systems available. It's built and maintained by a core team of developers, with contributions from the wider open-source community. It's used by universities, libraries and many web hosting providers as the default email client.
Numan Ozdemir disclosed his vulnerabilities to Horde in May. An attacker can scrape and download a victim's entire inbox by tricking them into clicking a malicious link in an email.
Once clicked, the inbox is downloaded to the attacker's server.
But the researcher did not hear back from the Horde community. Security researchers typically give organizations three months to fix flaws before they are publicly disclosed.
NIST, the government department that maintains the national vulnerability database, said this week that the flaws pose a "high" security risk to users.
