LiveActive security incident?Get immediate response
CVE Record

CVE-2021-45915: In LuxSoft LuxCal Web Calendar before 5.2.0, an unauthenticated attacker can manipulate a cookie value.

In LuxSoft LuxCal Web Calendar before 5.2.0, an unauthenticated attacker can manipulate a cookie value. This allows the attacker's session to be authenticated as any registered LuxCal user, including the site administrator.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

LuxCal Web Calendar versions before 5.2.0 allowed an unauthenticated attacker to alter a cookie so their session could become any registered user, including the administrator. For an exposed LuxCal site, this could mean unauthorized administrative access without stealing a password.

Executive priority

Treat exposed pre-5.2.0 LuxCal systems as urgent because the issue can lead directly to administrator impersonation. Priority depends on whether LuxCal is internet-facing and whether it stores sensitive scheduling or operational data.

Technical view

The CVE describes a cookie manipulation authentication bypass in LuxSoft LuxCal Web Calendar before 5.2.0. The public record does not provide CVSS, CWE mapping, exploit telemetry, or detailed affected CPEs. The key security impact is session authentication as arbitrary registered users, including site administrators.

Likely exposure

Exposure is limited to organizations running LuxSoft LuxCal Web Calendar before 5.2.0, especially internet-facing or broadly reachable calendar instances. The source bundle does not identify affected CPEs or deployment counts.

Exploitation context

CISA KEV status is false in the provided bundle, and no cited source here confirms active exploitation. Public details indicate unauthenticated cookie manipulation, but this assessment does not include exploit steps or proof-of-concept guidance.

Researcher notes

The public CVE data is sparse: no CVSS vector, CWE, CPE list, or confirmed exploitation status is provided. Analysis should stay anchored to the stated cookie manipulation authentication bypass and the version boundary before 5.2.0.

Mitigation direction

  • Inventory LuxCal Web Calendar instances and confirm their versions.
  • Upgrade affected LuxCal installations to 5.2.0 or later per vendor guidance.
  • Restrict network access to LuxCal until remediation is complete.
  • Review administrative accounts and sessions for unexpected activity.
  • Check vendor documentation for any additional hardening guidance.

Validation and detection

  • Verify each LuxCal instance reports version 5.2.0 or later.
  • Confirm no legacy LuxCal deployments remain exposed to the internet.
  • Review access logs for unusual unauthenticated requests followed by privileged activity.
  • Check recent administrative changes for unauthorized modifications.
  • Validate that monitoring covers LuxCal authentication and admin actions.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · low confidence lookup

CVE-2021-45915 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.