Security readout for executives and security teams
Plain-English summary
CVE-2021-4246 is a remotely reachable SQL injection issue in roxlukas LMeve’s Login Page involving the X-Forwarded-For value. The public record names a patch commit, but affected versions are not specified. Treat it as important for any exposed LMeve instance, especially where login records or application data matter.
Executive priority
Schedule remediation for any reachable LMeve deployment. The issue can affect application data through SQL injection, but current public evidence does not show active exploitation or broad product impact.
Technical view
The vulnerability is reported in roxlukas LMeve Login Page handling of X-Forwarded-For, leading to SQL injection. CVSS 3.1 is 6.3 with network attack vector, low complexity, low privileges required, no user interaction, and low C/I/A impact. Version data is listed as n/a.
Likely exposure
Exposure is limited to organizations running roxlukas LMeve, particularly reachable web deployments. The source bundle does not identify affected versions, CPEs, hosted service exposure, or distribution prevalence.
Exploitation context
The attack is described as remotely launchable, but CVSS lists low privileges required. No CISA KEV listing is provided, and the supplied sources do not state active exploitation in the wild.
Researcher notes
Source evidence is sparse: affected versions are n/a, component detail is limited to Login Page, and CWE is listed as CWE-707. Avoid assuming specific database impact beyond the reported C/I/A low ratings and SQL injection description.
Mitigation direction
- Apply upstream patch commit 29e1ead3bb1c1fad53b77dfc14534496421c5b5d.
- Check vendor or project guidance for affected version details.
- Restrict LMeve login access where business operations permit.
- Review trusted proxy handling for X-Forwarded-For values.
- Monitor authentication and database logs for suspicious input handling errors.
Validation and detection
- Inventory whether roxlukas LMeve is deployed or exposed.
- Confirm the patched commit is present in deployed code.
- Review Login Page code paths that consume X-Forwarded-For.
- Check web and database logs around authentication activity.
- Document compensating controls if patching is delayed.
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-707: 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 lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-4246 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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:U/C:L/I:L/A:L2.83.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/roxlukas/lmeve/commit/29e1ead3bb1c1fad53b77dfc14534496421c5b5dCVE reference
- https://vuldb.com/?id.216176CVE 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.
Improper Neutralization
Improper Neutralization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.