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CVE-2019-9874

Sitecore — Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability

Sitecore · CWE-502 — Deserialization of untrusted data · in CISA KEV since 2025-03-26

KEV since 2025 · listed over a yearCISA KEVActively Exploited
84

EVRS 84 of 100 Urgent

Patch This Cycle

Rank 493 of 2,960 tracked

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Why it scores 84

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.837.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

cms: update to a version newer than 7.2 | experience platform: update to a version newer than 8.2

Affected versions

  • cms>= 7.0 <= 7.2
  • experience platform>= 7.5 <= 8.2

Remediation

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Fixed versions from NVD.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 9.8 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.837 (99.69th pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2025-04-16 · KEV since 2025 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. None known Metasploit
EUVD cross-referenceENISA's record: CVSS 9.8 (v3.1), assigned by mitre. Listed ENISA EUVD

Description

NVD

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.

What CISA says to do