Security readout for executives and security teams
Plain-English summary
CVE-2020-3157 is a stored cross-site scripting issue in Cisco Identity Services Engine's web management interface. A signed-in user with write permission could save malicious configuration data that runs script in another administrator's browser when viewed. Business risk is moderate because exploitation needs credentials, write access, and user interaction, but ISE is a sensitive access-control platform.
Executive priority
Treat this as a moderate priority for ISE environments. It is not presented as actively exploited, but ISE protects identity and network access workflows. Prioritize remediation where many users have configuration write permissions or where the management interface is reachable from broad internal networks.
Technical view
Cisco ISE insufficiently validates user-supplied input in its web-based management interface. An authenticated remote attacker with write permissions can store a crafted configuration. When a user views it, arbitrary script can execute in the affected interface context, potentially exposing browser-based sensitive information or altering interface data. The issue maps to CWE-79 and has CVSS 3.0 score 5.4.
Likely exposure
Exposure is limited to organizations running Cisco Identity Services Engine Software with accessible web management interfaces. The bundle does not specify affected versions or CPEs, so teams must compare their ISE releases against Cisco's advisory. Risk increases where non-administrative or broad admin accounts can write configurations later reviewed by higher-privileged administrators.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires an authenticated remote user, write permissions, and another user viewing the malicious saved configuration. This is not described as unauthenticated or directly internet-wide exploitation in the provided sources.
Researcher notes
Key constraints are authenticated access, write permission, and victim interaction. The bundle lacks exact affected versions, fixed versions, and exploit observations beyond the vendor/CVE description. Validation should focus on product inventory, release comparison with Cisco guidance, permission boundaries, and whether saved configuration content can reach administrator browser sessions.
Mitigation direction
- Check Cisco's advisory for affected and fixed ISE release guidance.
- Upgrade or patch ISE according to Cisco's published remediation guidance.
- Restrict ISE management access to trusted administrative networks.
- Limit configuration write permissions to users who require them.
- Review privileged account use and remove unnecessary ISE admin roles.
Validation and detection
- Inventory all Cisco ISE deployments and management interface exposure.
- Compare deployed ISE versions against Cisco's advisory.
- Review ISE roles for accounts with configuration write permissions.
- Check recent configuration changes by lower-privileged administrative users.
- Confirm management access controls restrict untrusted network paths.
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-79: 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-2020-3157 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.4 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
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:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N2.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.4MediumVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20200304 Cisco Identity Services Engine Cross-Site Scripting VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.