What is CVE-2021-27653?

CVE-2021-27653 is a medium-severity vulnerability in Pega Infinity, classified under Improper Access Control. CVSS score: 6.6/10. Published 2021-04-01.

How severe is CVE-2021-27653?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Vulnerability in Pega Infinity

CVE-2021-27653

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

Published 2021-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.8th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Pega Infinity
Pega Systems Infinity — versions >=7.4.0, <8.5.3

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

collaborate.pega.com/discussion/pega-security-advisory-–-b21 (Vendor Advisory)
robertwillishacking.com/census-vulnerability-exposes-10k-oauth-tokens-thousands… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-27653?: CVE-2021-27653 is a medium-severity vulnerability in Pega Infinity, classified under Improper Access Control. CVSS score: 6.6/10. Published 2021-04-01.
How severe is CVE-2021-27653?: Medium severity. CVSS v3 base score is 6.6 out of 10.