Security readout for executives and security teams
Plain-English summary
BTCPay Server versions through 1.0.7.0 had a cookie protection weakness: a cookie lacked the HttpOnly flag. That can increase the impact of browser-side compromise because sensitive cookie data may be exposed to script access. The provided sources do not include a CVSS score or evidence of active exploitation.
Executive priority
Treat this as a focused remediation item for any organization using BTCPay Server. It is not supported as actively exploited by the supplied sources, but payment infrastructure should have a low tolerance for avoidable cookie exposure.
Technical view
CVE-2021-29247 describes sensitive information exposure in BTCPay Server through 1.0.7.0 caused by failure to set HttpOnly on a cookie. HttpOnly is a browser control that prevents client-side script access to cookies. The source bundle does not identify a CWE, affected CPEs, CVSS vector, or exact fixed release.
Likely exposure
Exposure is most likely for organizations running BTCPay Server version 1.0.7.0 or earlier, especially systems accessed through browsers by administrators or users. The bundle does not identify specific deployment modes, hosted services, or CPEs.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no cited source here states active exploitation. The issue is remotely relevant because it affects HTTP cookie handling, but successful impact would depend on surrounding browser and application conditions not detailed in the bundle.
Researcher notes
The public bundle is sparse: no CVSS, CWE, CPE, exploit evidence, or explicit fixed version is provided. Analysis should stay tied to the stated flaw, affected range, BTCPay disclosure, and release history rather than assuming broader product impact.
Mitigation direction
- Identify any BTCPay Server instances running 1.0.7.0 or earlier.
- Review BTCPay Server’s disclosure and releases for the vendor-supported fixed version.
- Upgrade affected instances according to vendor guidance.
- Limit access to sensitive BTCPay interfaces until remediation is complete.
- Confirm security-sensitive cookies use the HttpOnly attribute where applicable.
Validation and detection
- Inventory deployed BTCPay Server versions across production and non-production environments.
- Compare detected versions against the affected range: through 1.0.7.0.
- Review browser cookie attributes for BTCPay sessions after remediation.
- Check vendor release notes for any additional hardening or migration guidance.
- Document whether any exposed instance remains on an affected version.
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.
CVE-2021-29247 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/btcpayserver/btcpayserver/releasesCVE reference · x_refsource_MISC
- https://blog.btcpayserver.org/vulnerability-disclosure-v1-0-7-0/CVE 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.