Your WordPress Site Is Most Vulnerable Right Now

Key takeaways:

• The WordPress Vulnerability Report released December 3rd, 2023 identified 106 new vulnerabilities in the ecosystem, with 41 remaining unpatched as of the holiday period.
• Holiday periods consistently see higher exploitation rates because attacker activity does not slow down while security monitoring and patch deployment do.
• The difference between a WordPress site that survives the holiday period and one that gets compromised almost always comes down to decisions made weeks before anything goes wrong.

December Is When Attackers Do Their Best Work

The WordPress Vulnerability Report that dropped on December 3rd listed 106 new vulnerabilities across the ecosystem. Forty-one of them are still unpatched. That number alone would be worth paying attention to at any time of year. The timing makes it worse.

I have been building and maintaining WordPress sites since 2003. In that time I have seen the platform grow from a simple blogging tool into the infrastructure layer for roughly 43% of the web. With that scale comes a target. Vulnerabilities have always existed. What changes is how quickly they get patched, who is watching when they get exploited, and whether anyone is available to respond. Over Christmas and New Year, all three of those factors move in the wrong direction at once.

This is not speculation. The pattern is documented and repeatable. Attackers know that development teams go on leave. They know that the person who would normally get an alert at 2am and act on it is instead somewhere with bad mobile coverage and a drink in their hand. They know patch deployment slows to almost nothing between roughly December 20th and January 5th. They time their activity accordingly.

For anyone running a business on WordPress, particularly in Singapore where a significant share of clients’ revenue flows through digital channels year-round, the next two weeks are the highest-risk window of the year.

What does the December vulnerability data actually mean?

One hundred and six vulnerabilities in a single monthly report sounds alarming. The reality is more nuanced but still genuinely concerning. Most of those vulnerabilities exist in plugins, not in WordPress core itself. That matters because plugin update behaviour across the ecosystem is inconsistent. Some site owners update plugins within days of a patch release. Others have not touched their plugin list since September and would not notice a vulnerability notification if it landed in their inbox.

The 41 unpatched vulnerabilities are the ones that concern me most. An unpatched vulnerability is an open door with no fix available yet. The response to that situation is mitigation, not remediation. You use a web application firewall to block exploit attempts. You restrict access. You monitor closely. If you do not have those things in place before the vulnerability is discovered, you are trying to build the fence while the gate is already open.

Severity levels vary. Not every vulnerability on that list is catastrophic. Some require authenticated access. Some require a very specific plugin configuration to be exploitable. However, some are unauthenticated remote code execution risks, meaning an attacker does not need a login or any prior access to do damage. Those are the ones that move fast over holiday periods when response times are slow.

Why does site exploitation spike over holiday periods?

The honest answer is that exploitation does not spike because attackers suddenly get busier. It spikes because defenders get slower. Scanning and automated exploitation attempts happen around the clock every day of the year. The bots that probe for vulnerabilities do not take Christmas off. What changes is the response time on the defending side.

A site that would normally have a patch applied within 48 hours of release might sit unpatched for two to three weeks if the development team is on leave and no one has maintenance responsibility. A security alert that would normally trigger an immediate response might sit in an inbox unread for four days. A backup that should be verified daily might not have been checked since the team signed off for the holidays.

I talked to a client in Singapore earlier this year whose site was compromised during the Chinese New Year period. They had a development team, but no one had defined who was responsible for monitoring during the holiday. The site ran a WooCommerce store. It was injected with malware that redirected product pages to a phishing site. By the time anyone noticed, the site had been blacklisted by Google Safe Browsing. Getting delisted took eleven days. The revenue loss during that period was significant enough that they now pay for a managed maintenance plan that explicitly covers holiday monitoring. The cost of that plan is a fraction of what they lost in eleven days.

How do you know if your WordPress site is genuinely at risk right now?

The fastest indicator is WordPress core version. Sites still running 6.7 at this point in December 2023 have had multiple update cycles since that version was current. If a site has not been updated through those cycles, plugin and theme updates have almost certainly been skipped too. Version currency is not a guarantee of security, but version staleness is a reliable indicator of neglect.

Beyond core version, the questions I ask when assessing a site’s risk exposure are:

• When was the last backup taken, and has anyone verified it is actually restorable?
• Are there any plugins installed that are no longer actively maintained by their developers?
• Does anyone receive real-time alerts if the site goes down or behaves abnormally?
• Who is the emergency contact if something goes wrong on December 27th, and do they have access to act?

The last question is the one that reveals the most. A lot of businesses have a development team or agency relationship, but no defined response protocol for out-of-hours incidents. The development team is not the right emergency contact at 3am on Boxing Day. A managed maintenance provider with documented response procedures and system access is.

At Chillybin, the maintenance clients I am least worried about right now are the ones who upgraded to WordPress 6.4 within the first week of release, who have daily backups with verified restore points, and who have monitoring in place that alerts us directly rather than waiting for the client to notice something is wrong. Those sites will get through January without incident almost regardless of what happens in the vulnerability landscape.

The ones I would be concerned about if I were seeing them for the first time are sitting on outdated core versions, have plugins that last had commits in mid-2023, and are running with a backup solution that has never been tested. Those sites are exposed right now in a way that will not become visible until something has already happened.

What is the minimum a WordPress site needs before the holiday period?

There is no universal answer, but there is a practical floor below which a site should not go into the holiday period.

WordPress core should be current. As of December 2023 that means 6.4.x. If it is not, the update should happen before the team goes on leave, with a backup taken immediately before running it.

Every plugin should be reviewed. Not just updated, reviewed. Plugins that are not actively maintained should be evaluated for replacement or removal. An unmaintained plugin with a known vulnerability that has no patch coming is a liability, not a feature.

Backups should be daily and offsite. “We have backups” is not a useful answer. The useful answer is “we took a backup yesterday, it is stored separately from the hosting environment, and we tested the restore process last month.” Hosting-level snapshots that live on the same server as the site do not count as a meaningful backup strategy.

Monitoring should alert someone who can act. Uptime monitoring is table stakes. Beyond that, file integrity monitoring catches malware injections before they propagate. A web application firewall blocks known exploit patterns at the network level before they reach WordPress. Wordfence and Sucuri both cover this territory. Cloudflare provides an additional layer, though its December 5th outage this year was a useful reminder that infrastructure dependencies have their own failure modes.

Someone needs to be available. This might be an internal resource, it might be an agency with a defined maintenance agreement, it might be a managed WordPress host with security response built into their offering. The specific answer matters less than the fact that the answer exists and is tested.

What should WordPress site owners in Singapore do before January?

The practical steps are straightforward, even if they take time to complete properly. Run the WordPress core update if it is pending. Work through the plugin list and update everything that has an available update. Review anything that has not been updated by its developer in more than six months and make a decision about whether it belongs on the site. Confirm that backups are running, offsite, and restorable. Confirm that someone has monitoring access and a clear mandate to act if something triggers.

For most WordPress security scenarios in Singapore, the main risk is not that something sophisticated happens. Targeted attacks on specific businesses exist, but they are not the primary threat for most sites. The primary threat is automated scanning that finds a known vulnerability and exploits it because the patch was never applied. That is a solvable problem. It just requires someone to treat it as a priority before the holiday period rather than after.

The Cloudflare outage on December 5th is worth holding in mind as a separate data point. Infrastructure failures and vulnerability exploits are different risk categories, but they share a response-time problem over holiday periods. A site that loses Cloudflare protection during an outage while also carrying unpatched vulnerabilities is exposed on two fronts simultaneously. Layered security architecture matters precisely because no single layer is reliable all the time.

Twenty-five years of building and maintaining sites has made me very calm about most things in this industry. Trends come and go. Technology changes. What does not change is the relationship between unpatched systems and bad outcomes. A site that is current, backed up, and monitored will get through the holidays. A site that is none of those things is relying on luck, and luck is not a maintenance strategy.

The vulnerabilities documented in December are real. The holiday timing makes them more consequential than they would be in March or August. If there are decisions that need to be made before your team signs off for the year, this week is the week to make them.