CVE-2019-8991 [High] | CSRF in Activematrix Bpm

The administrator web interface of TIBCO Software Inc.'s TIBCO ActiveMatrix BPM, TIBCO ActiveMatrix BPM Distribution for TIBCO Silver Fabric, TIBCO ActiveMatrix Policy Director, TIBCO ActiveMatrix Service Bus, TIBCO ActiveMatrix Service Grid, TIBCO Silver Fabric Enabler for ActiveMatrix BPM, and TIBCO Silver Fabric Enabler for ActiveMatrix Service Grid contains multiple vulnerabilities that may allow for cross-site scripting (XSS) and cross-site request forgery (CSRF) attacks. Affected releases are TIBCO Software Inc.'s TIBCO ActiveMatrix BPM: versions up to and including 4.2.0, TIBCO ActiveMatrix BPM Distribution for TIBCO Silver Fabric: versions up to and including 4.2.0, TIBCO ActiveMatrix Policy Director: versions up to and including 1.1.0, TIBCO ActiveMatrix Service Bus: versions up to and including 3.3.0, TIBCO ActiveMatrix Service Grid: versions up to and including 3.3.1, TIBCO Silver Fabric Enabler for ActiveMatrix BPM: versions up to and including 1.4.1, and TIBCO Silver Fabric Enabler for ActiveMatrix Service Grid: versions up to and including 1.3.1.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.20%	0.95%	+0.75%
2	2025-10-15	0.32%	0.20%	-0.11%
3	2025-03-17	—	0.32%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.20%

0.95%

+0.75%

2025-10-15

0.32%

0.20%

-0.11%

2025-03-17

—

0.32%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.8	3.1	HIGH	`CVSS:3.1/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]
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]
6.8	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:P/I:P/A:P` 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:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	8.6	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.8

3.1

HIGH

CVSS:3.1/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]

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]

6.8

2.0

MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P 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:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

8.6

6.4

[email protected]

Affected software / configurations for CVE-2019-8991

Vendor	Product	Version	Raw CPE
tibco	activematrix_bpm	<= 4.2.0	cpe:2.3:a:tibco:activematrix_bpm::::::::
tibco	activematrix_bpm	<= 4.2.0	cpe:2.3:a:tibco:activematrix_bpm::::::silver_fabric::*
tibco	activematrix_policy_director	<= 1.1.0	cpe:2.3:a:tibco:activematrix_policy_director::::::::
tibco	activematrix_service_bus	<= 3.3.0	cpe:2.3:a:tibco:activematrix_service_bus::::::::
tibco	activematrix_service_grid	<= 3.3.0	cpe:2.3:a:tibco:activematrix_service_grid::::::silver_fabric::*
tibco	activematrix_service_grid	<= 3.3.1	cpe:2.3:a:tibco:activematrix_service_grid::::::::
tibco	silver_fabric_enabler	<= 1.3.1	cpe:2.3:a:tibco:silver_fabric_enabler::::::activematrix_service_grid::*
tibco	silver_fabric_enabler	<= 1.4.1	cpe:2.3:a:tibco:silver_fabric_enabler::::::activematrix_bpm::*

References for CVE-2019-8991

URL	Tags
http://www.securityfocus.com/bid/108059	Broken Link Third Party Advisory VDB Entry
http://www.tibco.com/services/support/advisories	Vendor Advisory
https://www.tibco.com/support/advisories/2019/04/tibco-security-advisory-april-24-2019-tibco-active-matrix-service-grid-2019-8991	Vendor Advisory

URL

CVE-2019-8991 | TIBCO Active Matrix Service Grid Administrator With Multiple Cross-Site Scripting and Cross-Site Request Forgery Vulnerabilities

Exploit prediction scoring system (EPSS) score for CVE-2019-8991

Common vulnerability scoring system (CVSS) metrics for CVE-2019-8991

Weakness enumeration for CVE-2019-8991

Affected software / configurations for CVE-2019-8991

References for CVE-2019-8991