CVE-2021-25655Network attack vector

User redirection to untrusted sites via Service Menu

Published Jun 24, 2021 · Updated Aug 3, 2024

Open redirect in the System Service Menu of Avaya Experience Portal 7.0 through 7.2.3 and 8.0.0 allows attackers to redirect users. The menu processes attacker-controlled redirect input without restricting the destination to trusted sites; Avaya has not disclosed the affected parameter or validation path. Reachability is unclear: Avaya assesses local low-privileged access without user interaction, while NVD assesses network delivery requiring user interaction.

CVSS severity4.4
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in the System Service Menu of Avaya Experience Portal 7.0 through 7.2.3 and 8.0.0 allows attackers to redirect users. The menu processes attacker-controlled redirect input without restricting the destination to trusted sites; Avaya has not disclosed the affected parameter or validation path. Reachability is unclear: Avaya assesses local low-privileged access without user interaction, while NVD assesses network delivery requiring user interaction.

The record

CVE
CVE-2021-25655
Published
Jun 24, 2021
Updated
Aug 3, 2024
Vendor
Avaya
Product
Avaya Experience Portal
Classifications
CWE-601
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 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=7.2.3 <7.0*
  2. Affected versionversion=8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Avaya · Avaya Experience Portalversion=7.2.3 <7.0*; version=8.0

Published CVSS scores

4.4Avaya, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')

Public exploit references

No public exploit references are available in this record.

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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