What’s Vulnerable › Vulnerabilities

CVE-2019-9580

• Severity: medium (CVSS 6.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-03-09 · updated 2026-06-17
• Weakness: CWE-79

Description

In st2web in StackStorm Web UI before 2.9.3 and 2.10.x before 2.10.3, it is possible to bypass the CORS protection mechanism via a "null" origin value, potentially leading to XSS.

Affected products

• Stackstorm: before 2.9.3; from 2.10.0 before 2.10.3 — fixed in 2.10.3, 2.9.3

How to fix

Upgrade to a fixed version: Stackstorm 2.10.3, 2.9.3. Check the vendor advisory for mitigations.

References

• https://github.com/StackStorm/st2/releases/tag/v2.10.3
• https://github.com/StackStorm/st2/releases/tag/v2.9.3
• https://stackstorm.com/2019/03/08/stackstorm-2-9-3-2-10-3/
• https://github.com/StackStorm/st2/releases/tag/v2.10.3
• https://github.com/StackStorm/st2/releases/tag/v2.9.3
• https://stackstorm.com/2019/03/08/stackstorm-2-9-3-2-10-3/

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