Sitecore Experience Platform (XP) prior to 9.1.1 is vulnerable to remote code execution via deserialization, aka TFS # 293863.

published 2019-06-06 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-2785

cvss: 8.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 13.9%; EPSS 13.9% chance of exploitation in 30 days, percentile 96%
public exploits: 1; Exploit-DB

Sitecore Experience Platform (XP) prior to 9.1.1 is vulnerable to remote code execution via deserialization, aka TFS # 293863. An authenticated user with necessary permissions is able to remotely execute OS commands by sending a crafted serialized object.

Patch / fix

fixed in 1

sitecore experience_platform 9.1.1

Timeline

2019-06-06 Published
2019-06-13 First public exploit (EDB-46987)

Exploit prediction

13.95% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-46987 Sitecore 8.x - Deserialization Remote Code Execution webapps, 2019-06-13
github.com https://github.com/minecrater/exploits/blob/master/Sitecore8xDeserialRCE referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	8.8	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C

Classification

Weakness

CWE-502 Deserialization of Untrusted Data

References

github.com /minecrater/exploits/blob/master/Sitecore8xDeserialRCE
exploit, third-party-advisory
dev.sitecore.net /Downloads/Sitecore%20Experience%20Platform/91/Sitecore%20Experience%20Platform%2091%20Update1/Release%20Notes
release-notes, vendor-advisory
packetstormsecurity.com /files/153274/Sitecore-8.x-Deserialization-Remote-Code-Execution.html

Sources

CVE List CVE-2019-11080
NVD CVE-2019-11080

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary