CVE-2019-9875 (GCVE-0-2019-9875)

Vulnerability from cvelistv5 – Published: 2019-05-31 20:34 – Updated: 2025-10-21 23:45
VLAI CISA KEV KEVintel KEV
Summary
Deserialization of Untrusted Data in the anti CSRF module in Sitecore through 9.1 allows an authenticated attacker to execute arbitrary code by sending a serialized .NET object in an HTTP POST parameter.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • n/a
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 26422a97-6f1c-402f-bd72-c6d168d9da31

Vulnerability ID: CVE-2019-9875

Status: Confirmed

Status Updated: 2025-03-26 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-03-26
Asserted: 2025-03-26
Scope
Notes: KEV entry: Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability | Affected: Sitecore / CMS and Experience Platform (XP) | Description: 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. | 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. | Due date: 2025-04-16 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB0038556 ; https://nvd.nist.gov/vuln/detail/CVE-2019-9875
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-502
Feed CISA Known Exploited Vulnerabilities Catalog
Product CMS and Experience Platform (XP)
Due Date 2025-04-16
Date Added 2025-03-26
Vendorproject Sitecore
Vulnerabilityname Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:26 UTC | Updated: 2026-02-06 07:17 UTC
KEVintel KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 434e7193-8904-4df3-858f-ca56e2b9d7b6

Vulnerability ID: CVE-2019-9875

Status: Confirmed

Status Updated: 2025-03-26 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-03-26
Asserted: 2025-03-26
Scope
Notes: KEVIntel entry: Deserialization of Untrusted Data in the anti CSRF module in Sitecore through 9.1 allows an authenticated attacker to execute arbitrary code by... | Affected: Sitecore / Sitecore CMS | CVSS: 8.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Deserialization of Untrusted Data in the anti CSRF module in Sitecore through 9.1 allows an authenticated attacker to execute arbitrary code by...
Vendor Sitecore
Product Sitecore CMS
Added Date 2025-03-26T00:00:00.000Z
Cvss Score 8.8
Epss Score None
Cvss Severity HIGH
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-19 12:46 UTC | Updated: 2026-06-19 12:46 UTC
Show details on NVD website
To clipboard 

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}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.