Security readout for executives and security teams
Plain-English summary
Avaya Aura Experience Portal has an open-redirect issue in its Service Menu. A low-privileged local user could craft a request that sends users or workflows to an untrusted site. The severity is medium, with limited confidentiality and availability impact reported.
Executive priority
Treat as a moderate-priority remediation item. It is not currently supported as actively exploited, but affected systems should be hotfixed because redirect flaws can support phishing or trust abuse.
Technical view
CVE-2021-25655 is CWE-601 URL redirection to an untrusted site in the system Service Menu component. Affected versions are Avaya Experience Portal 7.0 through 7.2.3 without hotfix, and 8.0.0 without hotfix. CVSS 3.1 score is 4.4 with local, low-privilege attack requirements.
Likely exposure
Exposure is limited to organizations running the listed Avaya Experience Portal versions without the relevant hotfix. The CVSS vector indicates local access and low privileges are required, reducing internet-scale exposure.
Exploitation context
The provided sources do not show active exploitation. The CVE is not listed as KEV in the bundle. No public exploit status is provided, so exploitation should not be assumed.
Researcher notes
Evidence is limited to the CVE record and Avaya reference. The key constraints are local attack vector, low privileges required, no user interaction, unchanged scope, and low confidentiality and availability impacts.
Mitigation direction
- Confirm the deployed Avaya Experience Portal version and hotfix status.
- Apply the Avaya hotfix or follow Avaya advisory guidance for affected versions.
- Restrict Service Menu access to authorized administrative users only.
- Review logs for unexpected Service Menu redirect behavior.
Validation and detection
- Inventory Avaya Experience Portal instances and record exact versions.
- Verify whether 7.0-7.2.3 or 8.0.0 systems have the hotfix installed.
- Check whether Service Menu access is limited to approved users.
- Review vendor advisory details before closing remediation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-601: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-25655 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L1.82.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://downloads.avaya.com/css/P8/documents/101076234CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
URL Redirection to Untrusted Site ('Open Redirect')
URL Redirection to Untrusted Site ('Open Redirect') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.