Security readout for executives and security teams
Plain-English summary
CVE-2022-31091 is a sensitive-header leakage issue in the PHP Guzzle HTTP client. When affected versions followed a redirect to the same host but a different port, Authorization and Cookie headers could be forwarded when they should have been stripped. This can expose credentials or session data to an unintended endpoint.
Executive priority
Treat this as high priority for internet-connected or integration-heavy PHP services using Guzzle with credentials or cookies. The fix is straightforward, and the business risk is unintended disclosure of tokens or session data.
Technical view
Guzzle redirect handling did not treat a port change as an origin change, so sensitive request headers could survive redirects across ports. Affected versions are Guzzle before 6.5.8 and 7.0.0 through before 7.4.5. The issue is CWE-200 with CVSS 3.1 score 7.7, driven by confidentiality impact.
Likely exposure
Exposure is most likely in PHP applications or dependencies using affected Guzzle versions, following redirects, and sending Authorization or Cookie headers. Systems using distribution packages may also be affected unless they received fixed Debian or Gentoo updates.
Exploitation context
The source bundle does not indicate CISA KEV listing or active exploitation. Practical risk depends on whether an application follows redirects while carrying sensitive headers, and whether redirected targets can reach a different port that receives those headers.
Researcher notes
The key behavior is redirect origin comparison: host and scheme checks were insufficient because port changes also alter origin. The advisory notes a partial 7.4.2 fix that did not fully cover scheme and port handling.
Mitigation direction
- Upgrade Guzzle 7 users to 7.4.5 or later.
- Upgrade earlier Guzzle series to 6.5.8 or 7.4.5.
- Disable redirects where redirects are not required or expected.
- Use custom redirect middleware if upgrading is temporarily impossible.
- Apply relevant Debian or Gentoo security updates where packaged versions are used.
Validation and detection
- Check composer.lock and dependency manifests for affected Guzzle versions.
- Review Guzzle client configuration for enabled redirect following.
- Identify requests that send Authorization or Cookie headers through Guzzle.
- Verify deployed packages include fixed upstream or distro-patched builds.
- Confirm vendor guidance before accepting compensating controls.
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-2022-31091 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/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:L/PR:L/UI:N/S:C/C:H/I:N/A:N3.14Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.7HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/guzzle/guzzle/commit/1dd98b0564cb3f6bd16ce683cb755f94c10fbd82CVE reference
- https://github.com/guzzle/guzzle/security/advisories/GHSA-q559-8m2m-g699CVE reference
- DSA-5246CVE reference · vendor-advisory
- GLSA-202305-24CVE reference · vendor-advisory
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.