CVE-2019-17330 [Critical]

The Web server component of TIBCO Software Inc.'s TIBCO EBX contains multiple vulnerabilities that theoretically allow authenticated users to perform stored cross-site scripting (XSS) attacks, and unauthenticated users to perform reflected cross-site scripting attacks. Affected releases are TIBCO Software Inc.'s TIBCO EBX: versions up to and including 5.8.1.fixR, versions 5.9.3, 5.9.4, 5.9.5, and 5.9.6.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-10	0.30%	0.19%	-0.11%
2	2025-11-21	0.36%	0.30%	-0.06%
3	2025-11-18	—	0.36%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-05-10

0.30%

0.19%

-0.11%

2025-11-21

0.36%

0.30%

-0.06%

2025-11-18

—

0.36%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.6	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	6.0	[email protected]
8.8	3.0	HIGH	`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	5.9	[email protected]
4.3	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:N/I:P/A:N` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:N) No availability impact.	8.6	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.6

3.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

6.0

[email protected]

8.8

3.0

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

5.9

[email protected]

4.3

2.0

MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:N): No availability impact.

8.6

2.9

[email protected]

Affected software / configurations for CVE-2019-17330

Vendor	Product	Version	Raw CPE
tibco	ebx	<= 5.8.1	cpe:2.3:a:tibco:ebx::::::::
tibco	ebx	5.8.1	cpe:2.3:a:tibco:ebx:5.8.1:fixr::::::
tibco	ebx	5.9.3	cpe:2.3:a:tibco:ebx:5.9.3:::::::*
tibco	ebx	5.9.4	cpe:2.3:a:tibco:ebx:5.9.4:::::::*
tibco	ebx	5.9.5	cpe:2.3:a:tibco:ebx:5.9.5:::::::*
tibco	ebx	5.9.6	cpe:2.3:a:tibco:ebx:5.9.6:::::::*

References for CVE-2019-17330

URL	Tags
http://www.tibco.com/services/support/advisories	Issue Tracking Vendor Advisory
https://www.tibco.com/support/advisories/2019/11/tibco-security-advisory-november-12-2019-tibco-ebx-2019-17330	Vendor Advisory

URL

CVE-2019-17330 | TIBCO EBX Exposes Multiple Cross-Site Scripting Vulnerabilities

Exploit prediction scoring system (EPSS) score for CVE-2019-17330

Common vulnerability scoring system (CVSS) metrics for CVE-2019-17330

Weakness enumeration for CVE-2019-17330

Affected software / configurations for CVE-2019-17330

References for CVE-2019-17330