There is evidence that the public website of New South Wales' anti-corruption watchdog, the Independent Commission Against Corruption, may have suffered an embarrassing security breach.
Copies of pages from the ICAC website cached by Google and other online services reveal apparent spam links to US payday loan lenders and vendors of a popular pharmaceutical designed for men that is frequently the subject of unwanted emails.
A copy of the ICAC homepage cached by Google on 3 May reveals the links.
The links were not visible to users but they can be seen in the cached version by examining the source code.
A spokesperson from ICAC declined to comment on whether the organisation's website had suffered from security problems.
ICAC has "no comment in relation to internet matters" the spokesperson said in an email.
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The links appear to be an attempt to boost the search results of the sites they link to.
A commonly used SEO technique is maximising the number of inbound links from external websites to try to boost the search ranking of a site.
Cached pages indicate the links appeared across the site.
The hidden links on one of the ICAC pages changed within the last few days.
ICAC's site appears to be running the open source Joomla content management system.