Security readout for executives and security teams
Plain-English summary
Bagisto eCommerce sites before version 2.3.10 have a high-severity flaw where a low-privilege user’s first or last name can trigger server-side template injection. In practical terms, a registered customer account may be enough to affect the server-side application. Bagisto 2.3.10 fixes the issue.
Executive priority
Treat as a high-priority eCommerce platform update. The issue may be reachable by low-privilege users and can affect server confidentiality, integrity, and availability. Upgrade exposed Bagisto stores promptly, with highest priority for public sites allowing customer accounts.
Technical view
CVE-2026-21449 is CWE-1336 server-side template injection in Bagisto before 2.3.10. The CVSS 4.0 score is 7.4 high: network-reachable, low complexity, low privileges required, no user interaction, with high confidentiality, integrity, and availability impact to the vulnerable system.
Likely exposure
Public Bagisto storefronts below 2.3.10 are most exposed, especially where untrusted users can create accounts or edit profile names. The source identifies first name and last name fields as the injection path. Admin privilege is not required.
Exploitation context
The record is not in CISA KEV, and the provided sources do not state active exploitation. The CVSS vector includes exploit maturity “P,” indicating proof-of-concept maturity in the scoring data, but no exploit details are provided here.
Researcher notes
Evidence is limited to the CVE data and Bagisto advisory reference. The core issue is SSTI through first and last name values in versions before 2.3.10. No active exploitation claim is supported by the provided sources, and no weaponization details should be inferred.
Mitigation direction
- Upgrade Bagisto to version 2.3.10 or later.
- Review the GitHub security advisory for vendor-specific guidance.
- Prioritize internet-facing stores with customer registration enabled.
- If immediate upgrade is delayed, reduce untrusted profile-name changes where operationally feasible.
Validation and detection
- Inventory all Bagisto deployments and record running versions.
- Confirm each deployment is version 2.3.10 or later.
- Review whether customer registration or profile editing is enabled.
- Check application logs for unusual activity involving name/profile fields.
- Track remediation status for all public storefronts.
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
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CWE-1336: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-21449 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
- 7.4 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
7.4HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/bagisto/bagisto/security/advisories/GHSA-mqhg-v22x-pqj8CVE reference · x_refsource_CONFIRM
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.
Improper Neutralization of Special Elements Used in a Template Engine
Improper Neutralization of Special Elements Used in a Template Engine represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.