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CVE-2019-9580

17
FAUCET Score

CVE-2019-9580 describes a Cross-Site Scripting (XSS) vulnerability in the StackStorm Web UI (st2web) versions prior to 2.9.3 and 2.10.3. This flaw allows attackers to bypass the Cross-Origin Resource Sharing (CORS) protection mechanism by using a "null" origin value. Rated Medium severity with a CVSS score of 6.1, the attack requires user interaction (UI:R) and could lead to partial loss of confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.9.3CPE matchmatch criteria
cpe:2.3:a:stackstorm:stackstorm:*:*:*:*:*:*:*:*
>= 2.10.0, < 2.10.3CPE matchmatch criteria
cpe:2.3:a:stackstorm:stackstorm:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.99%
Probability of exploitation in next 30 days
EPSS Percentile
85.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0299 is in the 94th percentile among its peer group of 26,208 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Remediation records are not available for this CVE.

References

github.com / StackStorm/st2/releases/tag/v2.10.3
Release NotesThird Party Advisory
github.com / StackStorm/st2/releases/tag/v2.9.3
Release NotesThird Party Advisory
stackstorm.com / 2019/03/08/stackstorm-2-9-3-2-10-3
Vendor Advisory