CVE-2019-13643

Severity: medium (CVSS 6.1 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-07-18 · updated 2026-06-17
Weakness: CWE-79

Description

Stored XSS in EspoCRM before 5.6.4 allows remote attackers to execute malicious JavaScript and inject arbitrary source code into the target pages. The attack begins by storing a new stream message containing an XSS payload. The stored payload can then be triggered by clicking a malicious link on the Notifications page.

Affected products

espocrm: before 5.6.4 — fixed in 5.6.4

How to fix

Upgrade to a fixed version: espocrm 5.6.4. Check the vendor advisory for mitigations.

References

https://github.com/espocrm/espocrm/issues/1349
https://github.com/espocrm/espocrm/milestone/64?closed=1
https://github.com/espocrm/espocrm/issues/1349
https://github.com/espocrm/espocrm/milestone/64?closed=1

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