CVE-2019-9874
Sitecore CMS and Experience Platform (XP) Deserial - [Actively Exploited]
Description
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.
INFO
Published Date :
May 31, 2019, 9:29 p.m.
Last Modified :
April 4, 2025, 3:38 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
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.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB0334035 ; https://nvd.nist.gov/vuln/detail/CVE-2019-9874
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2019-9874.
| URL | Resource |
|---|---|
| https://dev.sitecore.net/Downloads.aspx | Product Vendor Advisory |
| https://www.synacktiv.com/blog.html | Third Party Advisory |
| https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf | Exploit Patch Third Party Advisory |
| https://dev.sitecore.net/Downloads.aspx | Product Vendor Advisory |
| https://www.synacktiv.com/blog.html | Third Party Advisory |
| https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf | Exploit Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2019-9874 vulnerability anywhere in the article.
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Cyber Security News
CISA Adds Sitecore CMS Code Execution Vulnerability to List of Known Exploited Vulnerabilities
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has officially added two critical Sitecore CMS vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of ... Read more
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TheCyberThrone
CISA KEV Catalog Update Part VII – March 2025
CISA’s add vulnerabilities related to Sitecore CMS and Reviewdog GitHub Actions to its Known Exploited Vulnerabilities (KEV) catalog1. Sitecore CMS VulnerabilitiesCISA has identified critical vulnerab ... Read more
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The Hacker News
CISA Warns of Sitecore RCE Flaws; Active Exploits Hit Next.js and DrayTek Devices
Vulnerability / Threat Intelligence The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two six-year-old security flaws impacting Sitecore CMS and Experience Platform (XP) to it ... Read more
The following table lists the changes that have been made to the
CVE-2019-9874 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Modified Analysis by [email protected]
Apr. 04, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Removed CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H -
CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
Mar. 27, 2025
Action Type Old Value New Value Added Date Added 2025-03-26 Added Due Date 2025-04-16 Added 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. Added Vulnerability Name Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 26, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-502 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://dev.sitecore.net/Downloads.aspx Added Reference https://www.synacktiv.com/blog.html Added Reference https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jun. 03, 2019
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf No Types Assigned https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf Exploit, Patch, Third Party Advisory Changed Reference Type https://www.synacktiv.com/blog.html No Types Assigned https://www.synacktiv.com/blog.html Third Party Advisory Changed Reference Type https://dev.sitecore.net/Downloads.aspx No Types Assigned https://dev.sitecore.net/Downloads.aspx Product, Vendor Advisory Added CWE CWE-502 Added CPE Configuration OR *cpe:2.3:a:sitecore:cms:*:*:*:*:*:*:*:* versions from (including) 7.0 up to (including) 7.2 *cpe:2.3:a:sitecore:experience_platform:*:*:*:*:*:*:*:* versions from (including) 7.5 up to (including) 8.2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-9874 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2019-9874
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
23.12 }} -12.28%
score
0.95527
percentile