CVE-2021-42646 [Critical] | Information Disclosure in Api Manager

XML External Entity (XXE) vulnerability in the file based service provider creation feature of the Management Console in WSO2 API Manager 2.6.0, 3.0.0, 3.1.0, 3.2.0, and 4.0.0; and WSO2 IS as Key Manager 5.7.0, 5.9.0, and 5.10.0; and WSO2 Identity Server 5.7.0, 5.8.0, 5.9.0, 5.10.0, and 5.11.0. Allows attackers to gain read access to sensitive information or cause a denial of service via crafted GET requests.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	1.34%	3.67%	+2.32%
2	2025-11-21	3.58%	1.34%	-2.24%
3	2025-11-18	—	3.58%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

1.34%

3.67%

+2.32%

2025-11-21

3.58%

1.34%

-2.24%

2025-11-18

—

3.58%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.1	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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: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:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.2	[email protected]
6.4	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:P/I:N/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	10.0	4.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.1

3.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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: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:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.2

[email protected]

6.4

2.0

MEDIUM

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

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

10.0

4.9

[email protected]

Affected software / configurations for CVE-2021-42646

Vendor	Product	Version	Raw CPE
wso2	api_manager	2.6.0	cpe:2.3:a:wso2:api_manager:2.6.0:::::::*
wso2	api_manager	3.0.0	cpe:2.3:a:wso2:api_manager:3.0.0:::::::*
wso2	api_manager	3.1.0	cpe:2.3:a:wso2:api_manager:3.1.0:::::::*
wso2	api_manager	3.2.0	cpe:2.3:a:wso2:api_manager:3.2.0:::::::*
wso2	api_manager	4.0.0	cpe:2.3:a:wso2:api_manager:4.0.0:::::::*
wso2	identity_server	5.7.0	cpe:2.3:a:wso2:identity_server:5.7.0:::::::*
wso2	identity_server	5.8.0	cpe:2.3:a:wso2:identity_server:5.8.0:::::::*
wso2	identity_server	5.9.0	cpe:2.3:a:wso2:identity_server:5.9.0:::::::*
wso2	identity_server	5.10.0	cpe:2.3:a:wso2:identity_server:5.10.0:::::::*
wso2	identity_server	5.11.0	cpe:2.3:a:wso2:identity_server:5.11.0:::::::*
wso2	identity_server_as_key_manager	5.7.0	cpe:2.3:a:wso2:identity_server_as_key_manager:5.7.0:::::::*
wso2	identity_server_as_key_manager	5.9.0	cpe:2.3:a:wso2:identity_server_as_key_manager:5.9.0:::::::*
wso2	identity_server_as_key_manager	5.10.0	cpe:2.3:a:wso2:identity_server_as_key_manager:5.10.0:::::::*

References for CVE-2021-42646

URL	Tags
http://packetstormsecurity.com/files/167465/WSO2-Management-Console-XML-Injection.html	Third Party Advisory VDB Entry
http://seclists.org/fulldisclosure/2022/Jun/7	Mailing List Third Party Advisory
https://github.com/wso2/carbon-identity-framework/pull/3472	Patch Third Party Advisory
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2021/WSO2-2021-1289/

URL

CVE-2021-42646

Exploit prediction scoring system (EPSS) score for CVE-2021-42646

Common vulnerability scoring system (CVSS) metrics for CVE-2021-42646

Weakness enumeration for CVE-2021-42646

Affected software / configurations for CVE-2021-42646

References for CVE-2021-42646