Security readout for executives and security teams
Plain-English summary
Proxyee-Down users could be exposed to command execution if an attacker can get the app to use a malicious extension script. The public record says all versions are affected and, at publication, no patched version existed. This is not listed in CISA KEV, so active exploitation is not established by the provided sources.
Executive priority
Treat this as a targeted exposure issue, not a broad internet emergency. Prioritize removal or isolation if Proxyee-Down is present in managed environments, especially where users can add extensions or use untrusted networks.
Technical view
CVE-2021-32826 is a CWE-78 command execution issue in proxyee-down-org Proxyee-Down. The attack requires an attacker to provide an extension script, such as through a man-in-the-middle scenario or by hosting a malicious extension. CVSS is 6.8 with high attack complexity and high integrity impact.
Likely exposure
Exposure is likely limited to systems running Proxyee-Down, with the source bundle marking all versions affected. Risk rises where users install extensions from untrusted sources or use the software on networks where traffic manipulation is plausible.
Exploitation context
The provided sources describe a proof of concept in the GHSL advisory, but the CVE is not in KEV and no cited source states active exploitation. The attack condition depends on supplying a malicious extension script; the source bundle does not support broader unauthenticated exploitation claims.
Researcher notes
Evidence supports affected product, all-version scope, CWE-78 class, CVSS 6.8, and no patched version as of publication. The provided bundle does not establish current patch status, exploitation in the wild, or affected CPEs. Avoid inferring impact beyond Proxyee-Down extension script handling.
Mitigation direction
- Inventory and remove Proxyee-Down where it is not business-critical.
- Avoid installing Proxyee-Down extensions from untrusted or unaudited sources.
- Avoid using the software on untrusted networks where traffic manipulation is plausible.
- Check vendor or project guidance before assuming a fixed release exists.
- Apply any vendor-confirmed patched version if one is available.
Validation and detection
- Identify endpoints or servers running Proxyee-Down.
- Confirm whether any deployment matches the affected product listed in the CVE.
- Review installed extensions and their source provenance.
- Check whether vendor guidance names a patched build after the advisory date.
- Review endpoint telemetry for unexpected child processes from Proxyee-Down.
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-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-32826 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
- 6.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/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:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N2.24Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://securitylab.github.com/advisories/GHSL-2021-053-proxyee-down/CVE 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.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.