Vulnerability database
Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.
4 results
Sep 4, 2025Sitecore Multiple Products Deserialization of Untrusted Data VulnerabilityCVE-2025-53690 · Other software · Sitecore · reported by 9947ef80-c5d5-474a-bbab-97341a59000eExploitedCritical 9
Sitecore Experience Manager (XM), Experience Platform (XP), Experience Commerce (XC), and Managed Cloud contain a deserialization of untrusted data vulnerability involving the use of default machine keys. This flaw allows attackers to exploit exposed ASP.NET machine keys to achieve remote code execution.
- Product
- Multiple Products
- On CISA’s list since
- Sep 4, 2025 (federal fix deadline Sep 25, 2025)
- What to do
- Attackers are using this now. Install Sitecore’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD recordCISA catalogcloud.google.comsupport.sitecore.com
Mar 26, 2025Sitecore CMS and Experience Platform (XP) Deserialization VulnerabilityCVE-2019-9875 · Other software · Sitecore · reported by MITREExploitedHigh 8.8
Sitecore CMS and Experience Platform (XP) contain a deserialization vulnerability in the Sitecore.Security.AntiCSRF module that allows an authenticated attacker to execute arbitrary code by sending a serialized .NET object in the HTTP POST parameter __CSRFTOKEN.
- Product
- CMS and Experience Platform (XP)
- On CISA’s list since
- Mar 26, 2025 (federal fix deadline Apr 16, 2025)
- What to do
- Attackers are using this now. Install Sitecore’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD recordCISA catalogdev.sitecore.netsynacktiv.com
Mar 26, 2025Sitecore CMS and Experience Platform (XP) Deserialization VulnerabilityCVE-2019-9874 · Other software · Sitecore · reported by MITREExploitedCritical 9.8
Sitecore CMS and Experience Platform (XP) contain a deserialization vulnerability in the Sitecore.Security.AntiCSRF module that allows an unauthenticated attacker to execute arbitrary code by sending a serialized .NET object in the HTTP POST parameter __CSRFTOKEN.
- Product
- CMS and Experience Platform (XP)
- On CISA’s list since
- Mar 26, 2025 (federal fix deadline Apr 16, 2025)
- What to do
- Attackers are using this now. Install Sitecore’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD recordCISA catalogdev.sitecore.netsynacktiv.com
Mar 25, 2022Sitecore XP Remote Command Execution VulnerabilityCVE-2021-42237 · Other software · Sitecore · reported by MITREExploitedRansomwareCritical 9.8
Sitcore XP contains an insecure deserialization vulnerability which can allow for remote code execution.
- Product
- XP
- On CISA’s list since
- Mar 25, 2022 (federal fix deadline Apr 15, 2022)
- What to do
- Attackers are using this now. Install Sitecore’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD recordCISA catalogpacketstormsecurity.comblog.assetnote.io
Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.
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