Security readout for executives and security teams
Plain-English summary
CVE-2021-29368 is a high-severity session fixation issue reported in CuppaCMS through a specific 2019 commit. If present, an attacker could gain access to user sessions after user interaction, creating serious confidentiality, integrity, and availability risk for affected sites.
Executive priority
Treat this as high priority where CuppaCMS is deployed, especially on public sites or admin portals. Business urgency depends on whether the organization actually runs the affected code, because the public record lacks normalized affected-version data.
Technical view
The CVE describes CWE-384 session fixation in CuppaCMS through commit 4c9b742b23b924cf4c1f943f48b278e06a17e297. CVSS 3.1 is 8.8 with network attack vector, low complexity, no privileges required, and user interaction required. Public affected-version metadata is incomplete.
Likely exposure
Exposure is most likely in organizations running CuppaCMS code at or before the referenced commit. The CVE record does not provide CPEs, vendor-normalized product data, or a fixed version, so asset confirmation requires local inventory and code lineage review.
Exploitation context
The source bundle does not indicate known active exploitation, and the CVE is not marked KEV. The CVSS vector indicates remote reachability and user interaction, but the public sources provided do not establish exploit maturity or observed attacks.
Researcher notes
Evidence is limited to the CVE record, CVE List JSON, and the linked GitHub issue. Do not assume a fixed release, affected CPE, or exploitation in the wild from the provided sources. Focus research on code lineage and session lifecycle behavior.
Mitigation direction
- Identify whether any internet-facing site runs CuppaCMS.
- Compare deployed code against the referenced affected commit.
- Check the CuppaCMS issue and repository for maintainer remediation guidance.
- Restrict administrative access until session handling is confirmed safe.
- Invalidate existing sessions after any confirmed session-management remediation.
Validation and detection
- Inventory public and internal CuppaCMS deployments.
- Record deployed version, commit, or release lineage for each instance.
- Review whether sessions are regenerated after authentication state changes.
- Check access logs for unusual session reuse or account takeover indicators.
- Track the GitHub issue for maintainer clarification or fixed-release information.
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-384: 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 lookupCVE-2021-29368 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/CuppaCMS/CuppaCMS/issues/8CVE reference
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.
Session Fixation
Session Fixation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.