Deserialization in Sitecore Cms
CVE-2019-9874
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 obje…
Vulnerability class: Insecure Deserialization
EPSS: 0.839 (99.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Sitecore Cms
- Sitecore Experience_platform
- N/a — versions n/a
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
Public proof-of-concept exploits
References
- cve@mitre.org (Product, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Exploit, Patch, Third Party Advisory, x_refsource_MISC)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2019-9874?
- CVE-2019-9874 is a critical-severity vulnerability in Sitecore Cms, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2019-05-31.
- How severe is CVE-2019-9874?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2019-9874 known to be exploited?
- Yes. CVE-2019-9874 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-03-26), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.