high Known exploitedREV. 01

CVE-2019-9875Sitecore — deserialization in the request forgery module

Sitecore through 9.1 deserializes a framework object sent as a form parameter to its request forgery defence, so a signed-in user ends up running code on the server.

YOUR NEXT MOVE

Upgrade Sitecore past 9.1 now; a second deserialization flaw in this product is also under exploitation, so cover both in one pass.

Read the risk

THE VITAL STATS
CVSS score
8.8/ 10
CVSS v3.1
EPSS probability
14%
Likelihood of exploitation
Attack complexity
Low
Conditions needed to exploit
Known exploited
Yes — CISA KEV
CVE published
2019-05-31
Added to KEV
2025-03-26
Exploit published
Yes
Confidence
high
Kill chain
execution
MITRE ATT&CK
T1190
Severity
high

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attacker needsAn authenticated account on the Sitecore instance.

Behind the card

5 REFERENCES
Field-level provenanceTRACE THE SOURCES +

Which source supports each field, when it was retrieved, and who extracted it.

FieldsSourceRetrievedExtractorConfidence
cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_atnvd.nist.gov2026-09-24scrty-crds-pipeline/0.1high
exploitation.known_exploited, exploitation.kev_addedcisa.gov2026-09-24scrty-crds-pipeline/0.1high
epssapi.first.org2026-09-24scrty-crds-pipeline/0.1high
title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisitesnvd.nist.gov2026-09-24claude-codehigh

Printing history

THE RECORD
  1. r1Initial base card

First printing. This card has not been reprinted since publication.

crds:cve-2019-9875 · CRDS 0.1 · Issued 2026-09-24