CVE-2021-27651

published 2021-04-29

CVE-2021-27651: In versions 8.2.1 through 8.5.2 of Pega Infinity, the password reset functionality for local accounts can be used to bypass local authentication checks.

Priority P1 78 critical 9.8 CVSS 3.1

AV N AC L PR N UI N S U C H I H A H

EXPLOIT

In versions 8.2.1 through 8.5.2 of Pega Infinity, the password reset functionality for local accounts can be used to bypass local authentication checks.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
pega	infinity	8.2.1 – 8.5.2	—
pegasystems	pega_infinity	>= 8.2.1 < unspecified	unspecified
pegasystems	pega_infinity	>= unspecified < 8.5.2	8.5.2

Detection & IOCs extracted from sources · hover to see the quote

url /prweb/PRAuth/app/default/↗

• → Probe GET /prweb/PRAuth/app/default/ and check for HTTP 200 response containing the string 'Pega Infinity' in the body, then extract the version number to confirm affected range 8.2.1–8.5.2.
• → Extract the Pega version from the response body using the regex pattern '(?m)Pega ([0-9.]+)' to confirm whether the instance falls within the vulnerable range (8.2.1 through 8.5.2).

• · The Nuclei template's DSL version matcher is set to '= 8.2.1' only, which does not cover the full vulnerable range of 8.2.1 through 8.5.2 as described in the CVE. Detection logic should be expanded to cover all versions in that range. ↗
• · The template follows up to 2 redirects before evaluating the response, which may affect detection accuracy in environments with complex redirect chains on the login path.

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v3.0 9.8 CRITICAL CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 7.5 HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P

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CWE-287