CVE-2019-9874 (GCVE-0-2019-9874)

Vulnerability from cvelistv5 – Published: 2019-05-31 20:11 – Updated: 2025-10-21 23:45
VLAI CISA Shadowserver KEVIntel
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • n/a
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 6296e3ff-700f-4392-b387-ce7fb2fe2572

Vulnerability ID: CVE-2019-9874

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 unauthenticated 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=KB0334035 ; https://nvd.nist.gov/vuln/detail/CVE-2019-9874
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
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: fc454d6d-3bc8-4d70-a0c1-beffd8e4ea79

Vulnerability ID: CVE-2019-9874

Status: Confirmed

Status Updated: 2026-07-04 00:00 UTC

Exploited: Yes

Characteristics
Severity: 75.0
Timestamps
First Seen: 2026-03-09
Asserted: 2026-03-09
Last Seen: 2026-07-04
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Citrix / Citrix StoreFront Server | Class: other-software | Severity: High (CVSS 7.5) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-07-04: 17
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 1
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class other-software
7D Avg 0
Vendor Citrix
30D Avg 5
90D Avg 2
Product Citrix StoreFront Server
Cisa Kev yes
Connections 17
Observation Date 2026-07-04
Vulnerability Class CVSS
Vulnerability Score 7.5
Vulnerability Severity High
References
Created: 2026-06-30 09:23 UTC | Updated: 2026-07-06 01:01 UTC
KEVIntel
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 3b553c9e-9523-488c-81ca-fb51af0eb3dc

Vulnerability ID: CVE-2019-9874

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 Sitecore.Security.AntiCSRF (aka anti CSRF) module in Sitecore CMS 7.0 to 7.2 and Sitecore XP 7.5 to 8.2... | Affected: Sitecore / CMS | CVSS: 9.8 (CRITICAL) | 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 Sitecore.Security.AntiCSRF (aka anti CSRF) module in Sitecore CMS 7.0 to 7.2 and Sitecore XP 7.5 to 8.2...
Vendor Sitecore
Product CMS
Added Date 2025-03-26T00:00:00.000Z
Cvss Score 9.8
Epss Score None
Cvss Severity CRITICAL
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:06 UTC | Updated: 2026-06-23 14:06 UTC
Show details on NVD website
To clipboard 

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}


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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.