CVE-2019-9875

HIGHNVD 8.89.0▲Trending — 4 sources updated this weekExploited in the wild

8.8

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.

CVSS v3: 8.8
EG Score: 9.0(high)
EPSS: 98.2%
KEV: ⚠ Exploited

Published

May 31, 2019

Last Modified

November 7, 2025

Advisory Details (2)

Auto-updated Jun 2, 2026

⚠️ Active exploitation confirmed. Patch available. Sources: cisa.

cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9875

generic🔴 Active Exploitation

Publications

https://www.synacktiv.com/blog.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-502Deserialization of Untrusted Data

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-03 19:55 UTCEG score recompute
2026-06-03 19:55 UTCGHSA enrichment
2026-06-03 19:09 UTCkev_newly_listed
2026-06-03 15:57 UTCEG score recompute
2026-06-03 15:57 UTCGHSA enrichment
2026-06-03 11:59 UTCEG score recompute
2026-06-03 11:59 UTCGHSA enrichment
2026-06-03 08:01 UTCEG score recompute
2026-06-03 08:01 UTCGHSA enrichment
2026-06-03 04:03 UTCEG score recompute
2026-06-03 04:03 UTCGHSA enrichment
2026-06-03 00:05 UTCEG score recompute
2026-06-03 00:05 UTCGHSA enrichment
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:07 UTCEG score recompute
2026-06-02 20:07 UTCGHSA enrichment
2026-06-02 18:32 UTCkev_newly_listed
2026-06-02 16:09 UTCEG score recompute
2026-06-02 16:09 UTCGHSA enrichment

Frequently asked(6)

What is CVE-2019-9875?

CVE-2019-9875 is a high vulnerability published on May 31, 2019. 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.

When was CVE-2019-9875 disclosed?

CVE-2019-9875 was first published in the National Vulnerability Database on May 31, 2019, with the most recent update on November 7, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-9875 actively exploited?

Yes. CISA added CVE-2019-9875 to the Known Exploited Vulnerabilities catalog on March 26, 2025, affecting Sitecore CMS and Experience Platform (XP). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2019-9875?

CVE-2019-9875 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.

Which products are affected by CVE-2019-9875?

CVE-2019-9875 affects Sitecore CMS and Experience Platform (XP). The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2019-9875?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-9875, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2019-9875

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CVE-2019-9875

📅 Published

🔄 Last Modified

📋 Advisory Details (2)