The makers of Foxit Reader — a free alternative application to Adobe’s software for viewing portable document format (PDF) files — has issued an update that plugs several security holes. Hats off to Foxit Software, which turned around a patched version of its program about 24 hours after a security researcher published information about the vulnerabilities. The latest build, available from this link, brings the current, patched version to 2.3 Build 2825. The “what’s new?” page describing the new features in Foxit 2.3 is largely devoid of any information about security updates. But a post to the Foxit user forum indicates the security flaws disclosed last week have indeed been addressed in this latest version.