Security readout for executives and security teams
Plain-English summary
Mesa Labs AmegaView 3.0 used default cookies in a way that could let someone bypass login to the web application. If reachable by an attacker, this may allow unauthorized access with some loss of confidentiality, integrity, and availability.
Executive priority
Treat this as a high-priority exposure review for any environment using AmegaView 3.0. The business issue is unauthorized access to a monitoring web application, not just a technical configuration problem.
Technical view
CVE-2021-27453 is an authentication bypass in Mesa Labs AmegaView 3.0, mapped to CWE-288. The published CVSS v3.1 score is 7.3 with network attack vector, low complexity, no privileges, and no user interaction required.
Likely exposure
Exposure is most relevant where Mesa Labs AmegaView 3.0 is deployed and its web application is reachable over a network. The source bundle does not define additional affected versions or CPEs.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Risk remains meaningful because the flaw is network-reachable, unauthenticated, low complexity, and does not require user interaction.
Researcher notes
Evidence is limited to the CVE description and CISA ICS advisory reference. The affected product is Mesa Labs AmegaView 3.0, with default cookies enabling authentication bypass. No patch details are present in the provided bundle.
Mitigation direction
- Review the CISA advisory and Mesa Labs guidance for supported corrective actions.
- Inventory Mesa Labs AmegaView deployments and identify any version 3.0 instances.
- Limit AmegaView web access to trusted administrative networks where feasible.
- Monitor for unexpected web sessions, authentication anomalies, and suspicious access patterns.
Validation and detection
- Confirm whether Mesa Labs AmegaView 3.0 is present in the environment.
- Verify whether the web application is reachable from untrusted network paths.
- Perform an authorized authentication-bypass validation without using production accounts.
- Re-check the system after applying vendor or CISA-recommended corrective actions.
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-288: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-27453 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
- High
- CVSS
- 7.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L3.93.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://us-cert.cisa.gov/ics/advisories/icsa-21-147-03CVE reference · x_refsource_CONFIRM
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.
Authentication Bypass Using an Alternate Path or Channel
Authentication Bypass Using an Alternate Path or Channel represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.