CVE-2021-35494 [Medium] | Security Vulnerability in Jasperreports Server

The Rest API component of TIBCO Software Inc.'s TIBCO JasperReports Server, TIBCO JasperReports Server, TIBCO JasperReports Server, TIBCO JasperReports Server, TIBCO JasperReports Server - Community Edition, TIBCO JasperReports Server - Developer Edition, TIBCO JasperReports Server for AWS Marketplace, TIBCO JasperReports Server for ActiveMatrix BPM, and TIBCO JasperReports Server for Microsoft Azure contain a race condition that allows a low privileged authenticated attacker via the REST API to obtain read access to temporary objects created by other users on the affected system. Affected releases are TIBCO Software Inc.'s TIBCO JasperReports Server: versions 7.2.1 and below, TIBCO JasperReports Server: versions 7.5.0 and 7.5.1, TIBCO JasperReports Server: version 7.8.0, TIBCO JasperReports Server: version 7.9.0, TIBCO JasperReports Server - Community Edition: versions 7.8.0 and below, TIBCO JasperReports Server - Developer Edition: versions 7.9.0 and below, TIBCO JasperReports Server for AWS Marketplace: versions 7.9.0 and below, TIBCO JasperReports Server for ActiveMatrix BPM: versions 7.9.0 and below, and TIBCO JasperReports Server for Microsoft Azure: version 7.8.0.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.22%	0.49%	+0.26%
2	2025-03-30	0.47%	0.22%	-0.24%
3	2025-03-29	—	0.47%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.22%

0.49%

+0.26%

2025-03-30

0.47%

0.22%

-0.24%

2025-03-29

—

0.47%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.7	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N` 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:L) A normal user session is enough; they don’t have to be admin. 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:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	2.1	3.6	[email protected]
5.3	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N` 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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. 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:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	1.6	3.6	[email protected]
3.5	2.0	LOW	`AV:N/AC:M/Au:S/C:P/I:N/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:S) A single authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:N) No availability impact.	6.8	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.7

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N 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:L): A normal user session is enough; they don’t have to be admin.
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:N): Data isn’t meaningfully altered or forged.
Availability (A:N): Service keeps running; no real outage angle.

2.1

3.6

[email protected]

5.3

3.1

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N 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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
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:N): Data isn’t meaningfully altered or forged.
Availability (A:N): Service keeps running; no real outage angle.

1.6

3.6

[email protected]

3.5

2.0

LOW

AV:N/AC:M/Au:S/C:P/I:N/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:S): A single authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:N): No availability impact.

6.8

2.9

[email protected]

Affected software / configurations for CVE-2021-35494

Vendor	Product	Version	Raw CPE
tibco	jasperreports_server	<= 7.2.1	cpe:2.3:a:tibco:jasperreports_server::::::-::*
tibco	jasperreports_server	<= 7.8.0	cpe:2.3:a:tibco:jasperreports_server::::::microsoft_azure::*
tibco	jasperreports_server	<= 7.8.0	cpe:2.3:a:tibco:jasperreports_server:::::community:::*
tibco	jasperreports_server	<= 7.9.0	cpe:2.3:a:tibco:jasperreports_server::::::activematrix_bpm::*
tibco	jasperreports_server	<= 7.9.0	cpe:2.3:a:tibco:jasperreports_server::::::aws_marketplace::*
tibco	jasperreports_server	<= 7.9.0	cpe:2.3:a:tibco:jasperreports_server:::::developer:::*
tibco	jasperreports_server	7.5.0	cpe:2.3:a:tibco:jasperreports_server:7.5.0:::::-::
tibco	jasperreports_server	7.5.1	cpe:2.3:a:tibco:jasperreports_server:7.5.1:::::-::
tibco	jasperreports_server	7.8.0	cpe:2.3:a:tibco:jasperreports_server:7.8.0:::::-::
tibco	jasperreports_server	7.9.0	cpe:2.3:a:tibco:jasperreports_server:7.9.0:::::-::

References for CVE-2021-35494

URL	Tags
https://www.tibco.com/services/support/advisories	Vendor Advisory
https://www.tibco.com/support/advisories/2021/10/tibco-security-advisory-october-12-2021-tibco-jasperreports-server-2021-35494	Vendor Advisory

URL

CVE-2021-35494 | TIBCO JasperReports unauthorized access to temporary object

Exploit prediction scoring system (EPSS) score for CVE-2021-35494

Common vulnerability scoring system (CVSS) metrics for CVE-2021-35494

Weakness enumeration for CVE-2021-35494

Affected software / configurations for CVE-2021-35494

References for CVE-2021-35494