What is CVE-2021-25656?

CVE-2021-25656 is a medium-severity vulnerability in Avaya Aura Experience Portal, classified under Cross-site Scripting. CVSS score: 5.3/10. Published 2021-06-24.

How severe is CVE-2021-25656?

Medium severity. CVSS v3 base score is 5.3 out of 10.

XSS in Avaya Aura Experience Portal

CVE-2021-25656

Stored XSS injection vulnerabilities were discovered in the Avaya Aura Experience Portal Web management which could allow an authenticated user to potentially disclose sensitive information. Affected versions include 7.0 through 7.2.3 (without hotfix) and 8.0.0 (without hotfix).

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-06-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (25.2th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Avaya Aura Experience Portal — versions 8.0.0
Avaya Product — versions 8.0, 7.2.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

downloads.avaya.com/css/P8/documents/101076234 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-25656?: CVE-2021-25656 is a medium-severity vulnerability in Avaya Aura Experience Portal, classified under Cross-site Scripting. CVSS score: 5.3/10. Published 2021-06-24.
How severe is CVE-2021-25656?: Medium severity. CVSS v3 base score is 5.3 out of 10.