Security readout for executives and security teams
Plain-English summary
CVE-2021-23592 affects the PHP package topthink/framework before 6.0.12. The risk is that unsafe deserialization in a Driver class could let an unauthenticated network attacker impact confidentiality and integrity if they can reach the vulnerable path. Public sources rate it high severity, but do not show confirmed active exploitation.
Executive priority
Treat as a high-priority dependency remediation for any internet-facing PHP application using affected topthink/framework versions. Prioritize inventory first, because the sources do not prove all installations are exploitable.
Technical view
The issue is deserialization of untrusted data in topthink/framework before 6.0.12, attributed to an insecure unserialize method in the Driver class. CVSS 3.1 is 7.7 with network attack vector, no privileges, no user interaction, high complexity, and high confidentiality/integrity impact.
Likely exposure
Exposure is likely limited to applications that include topthink/framework versions earlier than 6.0.12. The provided evidence does not identify specific applications, routes, configurations, or deployment patterns needed to prove reachability.
Exploitation context
The CVE record marks exploitation as proof-of-concept in the CVSS temporal vector, and KEV is false. The supplied sources do not provide evidence of active exploitation or weaponized attacks.
Researcher notes
The available bundle identifies the package, vulnerable version range, vulnerable class behavior, CVSS, release, and fixing commit. It does not provide CWE mapping, exploit details, affected routes, or deployment-specific preconditions. Validate reachability before escalating beyond dependency upgrade urgency.
Mitigation direction
- Upgrade topthink/framework to version 6.0.12 or later.
- Review the vendor release and commit linked in the advisory.
- Check vendor guidance for any additional hardening recommendations.
- Reduce exposure of endpoints that process serialized input where feasible.
Validation and detection
- Inventory PHP dependencies for topthink/framework versions before 6.0.12.
- Confirm deployed application builds use the remediated dependency version.
- Review code paths that may pass untrusted data into framework deserialization.
- Check logs for unusual errors around serialized payload handling.
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-2021-23592 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
- 7.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L/E:P
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:U/C:H/I:H/A:L/E:P2.25.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.7HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L/E:P
Source materials
- CVE List V5 sourceCVE List V5
- https://snyk.io/vuln/SNYK-PHP-TOPTHINKFRAMEWORK-2385695CVE reference · x_refsource_MISC
- https://github.com/top-think/framework/releases/tag/v6.0.12CVE reference · x_refsource_MISC
- https://github.com/top-think/framework/commit/d3b5aeae94bc71bae97977d05cd12c3e0550905cCVE 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.