What’s Vulnerable › Vulnerabilities

CVE-2021-27653

• Severity: medium (CVSS 4.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-01 · updated 2026-06-17
• Weakness: CWE-284

Description

Misconfiguration of the Pega Chat Access Group portal in Pega platform 7.4.0 - 8.5.x could lead to unintended data exposure.

Affected products

• Pega Systems Pega Infinity: from 7.4.0 before 8.5.3 — fixed in 8.5.3

How to fix

Upgrade to a fixed version: Pega Systems Pega Infinity 8.5.3. Check the vendor advisory for mitigations.

References

• https://collaborate.pega.com/discussion/pega-security-advisory-%E2%80%93-b21
• https://robertwillishacking.com/census-vulnerability-exposes-10k-oauth-tokens-thousands-of-user-records/
• https://collaborate.pega.com/discussion/pega-security-advisory-%E2%80%93-b21
• https://robertwillishacking.com/census-vulnerability-exposes-10k-oauth-tokens-thousands-of-user-records/

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