CVE-2019-9875 (GCVE-0-2019-9875)
Vulnerability from cvelistv5 – Published: 2019-05-31 20:34 – Updated: 2025-10-21 23:45Summary
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)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-26 20:22 UTC
CWE
- n/a
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://dev.sitecore.net/Downloads.aspx | x_refsource_MISC |
| https://www.synacktiv.com/blog.html | x_refsource_MISC |
| https://www.synacktiv.com/ressources/advisories/S… | x_refsource_MISC |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 3216fafe-c86f-4e2f-be44-08fa643d159c
Exploited: Yes
Timestamps
First Seen: 2025-03-26
Asserted: 2025-03-26
Scope
Notes: 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: 2026-10-02 08:09 CEST
| Updated: 2026-10-02 08:09 CEST
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 6e967811-2c31-425f-8242-2035a09941f6
Exploited: Yes
Timestamps
First Seen: 2025-03-26
Asserted: 2025-03-26
Scope
Notes: 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) | EPSS: 0.13795 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: previdian
Details
| Feed | Previdian (previdian.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... |
| Cve Id | CVE-2019-9875 |
| Vendor | Sitecore |
| Ghsa Id | None |
| Product | Sitecore CMS |
| Added Date | 2025-03-26T00:00:00.000Z |
| Cvss Score | 8.8 |
| Epss Score | 0.13795 |
| Previous Ids | |
| Cvss Severity | HIGH |
| Virtual Patch | False |
| Cvss Estimated | False |
| Epss Percentile | 0.96407 |
| Used In Malware | unknown |
| Vulnerability Id | CVE-2019-9875 |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-10-02 09:11 CEST
| Updated: 2026-10-02 09:11 CEST
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"dateReserved": "2019-03-19T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:45:35.858Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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