Security readout for executives and security teams
Plain-English summary
CVE-2020-3345 is a medium-severity HTML injection issue in certain Cisco Webex pages. An attacker would need to convince a user to open a crafted link. If successful, the viewed page content could be altered, including redirecting the user to potentially malicious websites or enabling further client-side attacks.
Executive priority
Treat this as a moderate remediation item. It can support phishing and client-side abuse, but requires user interaction and has no cited active exploitation in the supplied sources. Prioritize patch verification for exposed Webex services.
Technical view
The flaw is improper validation of parameter values on affected Cisco Webex Meetings and Webex Meetings Server pages. It is remotely reachable without authentication, requires user interaction, and has low integrity impact only. The supplied CVSS v3.0 score is 4.3 with vector AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
Likely exposure
Exposure is most likely where Cisco Webex Meetings Server or Cisco Webex Meetings web pages from the advisory are accessible to users. The bundle lists Cisco WebEx Meetings Server with unspecified versions, so exact version exposure must be confirmed from Cisco guidance.
Exploitation context
The supplied sources do not support active exploitation. The bundle marks KEV as false. Exploitation requires social engineering a user into following a crafted link, limiting urgency compared with server-side unauthenticated takeover issues.
Researcher notes
Evidence is limited to CVE metadata and Cisco’s advisory reference. The bundle does not provide exact affected versions, fixed versions, or workaround details. Validate against the vendor advisory before asserting product scope or remediation completeness.
Mitigation direction
- Review Cisco advisory cisco-sa-webex-html-BJ4Y9tX for affected and fixed releases.
- Apply Cisco-provided updates or mitigations where applicable.
- Limit exposure of self-hosted Webex Meetings Server administrative and user portals where possible.
- Warn users about unexpected Webex links until affected systems are addressed.
Validation and detection
- Inventory Cisco Webex Meetings Server deployments and managed Webex environments.
- Compare deployed versions against Cisco advisory guidance.
- Check whether affected Webex pages are reachable by untrusted users.
- Review support tickets or telemetry for suspicious Webex redirects.
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
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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2020-3345 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
- 4.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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:N/UI:R/S:U/C:N/I:L/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
4.3MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20200715 Cisco Webex Meetings and Cisco Webex Meetings Server HTML Injection 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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.