Security advisories
Urgent issues worth acting on this week.
We post here rarely, and only when three things are true: a flaw is being exploited or is about to be, it affects software small businesses commonly run, and there is something concrete you can do about it. Each advisory links to the original sources.
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Advisories are general information, not advice for your particular environment. They are dated, and archived ones are kept for reference rather than kept current. For the authoritative position, follow the sources linked in each advisory. Subscribe with the advisories RSS feed.