CVE-2021-27651Public exploitNetwork attack vector

Unauthenticated account takeover via forced password reset

Published Apr 29, 2021 · Updated Aug 3, 2024

Improper authentication in Pega Infinity 8.2.1 through 8.5.2 allows remote attackers to reset local-account passwords. The reset flow accepts a forced POST to Code-Security.pzChangeUserPassword with guest authorization, allowing its confirmation stage to be skipped. No credentials or user interaction are required, and changing an administrator password grants account control and access to administrator-only actions.

CVSS severity9.8
Critical
EPSS probability53.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Pega Infinity 8.2.1 through 8.5.2 allows remote attackers to reset local-account passwords. The reset flow accepts a forced POST to Code-Security.pzChangeUserPassword with guest authorization, allowing its confirmation stage to be skipped. No credentials or user interaction are required, and changing an administrator password grants account control and access to administrator-only actions.

The record

CVE
CVE-2021-27651
Published
Apr 29, 2021
Updated
Aug 3, 2024
Vendor
Pegasystems Inc.
Product
Pega Infinity
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.2.1 <unspecified
  2. Affected versionversion=unspecified <8.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pegasystems Inc. · Pega Infinityversion=8.2.1 <unspecified; version=unspecified <8.5.2

Published CVSS scores

9.8Pegasystems Inc.CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.1Pegasystems Inc.CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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