Security readout for executives and security teams
Plain-English summary
Some applications using NestJS Proxy could have unintentionally sent sensitive cookies, including session cookies, to backend services that were not supposed to receive them. The maintained @finastra package fixed this in 0.7.0 by blocking cookies by default.
Executive priority
Moderate priority. Prioritize internet-facing or session-bearing applications that use this proxy library, because the business risk is accidental exposure of authentication or session data to unintended backend services.
Technical view
Before @finastra/nestjs-proxy 0.7.0, the library lacked a control to prevent sensitive cookies from being forwarded to developer-configured backend services. The fix blocks cookie forwarding by default and allows explicit cookie names through the allowedCookies setting. The deprecated @ffdc package is not maintained.
Likely exposure
Exposure is likely limited to applications using @finastra/nestjs-proxy before 0.7.0 or deprecated @ffdc/nestjs-proxy, especially where proxied backend services should not receive user cookies.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not in KEV. CVSS indicates local attack vector, high privileges, and user interaction, with potential high confidentiality and integrity impact.
Researcher notes
Focus analysis on dependency version, package lineage, proxy configuration, and whether sensitive cookies traverse trust boundaries. The source bundle names the fix and migration path but does not provide evidence of exploitation in the wild.
Mitigation direction
- Upgrade @finastra/nestjs-proxy to version 0.7.0 or later.
- Replace deprecated @ffdc/nestjs-proxy with @finastra/nestjs-proxy.
- Use allowedCookies only for explicitly required cookie names.
- Review vendor guidance before changing proxy cookie behavior.
Validation and detection
- Check package manifests and lockfiles for @finastra/nestjs-proxy versions below 0.7.0.
- Check for any dependency on deprecated @ffdc/nestjs-proxy.
- Review proxy configuration for allowedCookies usage.
- Confirm proxied backend services do not receive unintended cookies.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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-2022-31070 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
- 5.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/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:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N0.65.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.8MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/Finastra/finastra-nodejs-libs/security/advisories/GHSA-77mv-4rg7-r8qvCVE reference · x_refsource_CONFIRM
- https://github.com/Finastra/finastra-nodejs-libs/pull/232CVE 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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.