Known exploited vulnerability
CVE-2019-9874
The short answer
CVE-2019-9874 affects n/a n/a and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-03-26: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
Deserialization of Untrusted Data in the Sitecore.Security.AntiCSRF (aka anti CSRF) module in Sitecore CMS 7.0 to 7.2 and Sitecore XP 7.5 to 8.2 allows an unauthenticated attacker to execute arbitrary code by sending a serialized .NET object in the HTTP POST parameter __CSRFTOKEN.
Weakness: CWE-502.
Severity
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Mar 26, 2025
Federal due date Apr 16, 2025
EPSS, next 30 days
84%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected products
n/a. NVD's record lists the exact affected versions.
References
- dev.sitecore.net/Downloads.aspx ProductVendor Advisory
- www.synacktiv.com/blog.html Third Party Advisory
- www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf ExploitPatchThird Party Advisory
- dev.sitecore.net/Downloads.aspx ProductVendor Advisory
- www.synacktiv.com/blog.html Third Party Advisory
- www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf ExploitPatchThird Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9874 US Government Resource
Questions
Is CVE-2019-9874 being exploited?
Yes. CISA added CVE-2019-9874 to its Known Exploited Vulnerabilities catalog on 2025-03-26, with a federal remediation due date of 2025-04-16.
How do I fix CVE-2019-9874?
CISA's required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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