Security readout for executives and security teams
Plain-English summary
This is a low-severity issue in HCL Digital Experience where user-supplied input can appear in an error response. An attacker could use that behavior to support a phishing scenario, but the published scoring indicates high attack complexity and required user interaction.
Executive priority
Handle through standard vulnerability management, with extra attention to public portals and phishing risk. This is not presented as an emergency in the supplied sources.
Technical view
CVE-2021-27774 affects HCL Digital Experience 8.5, 9.0, and 9.5. The record describes an injection issue involving user input included in an error response, mapped to CWE-209. CVSS 3.1 is 3.1 with network attack vector, no privileges required, user interaction required, and low integrity impact only.
Likely exposure
Organizations running HCL Digital Experience versions 8.5, 9.0, or 9.5 are potentially exposed, especially public-facing portals where crafted error responses could be shown to users.
Exploitation context
The source bundle does not indicate active exploitation, and the CVE is not listed as KEV. The main concern is phishing support rather than direct data theft or service disruption.
Researcher notes
Do not assume cross-site scripting, exploit availability, or a specific patch from the provided evidence. The public description is narrow: user input in an error response could aid phishing, with low CVSS severity and incomplete remediation detail.
Mitigation direction
- Review HCL KB0100491 for vendor-approved remediation guidance.
- Inventory HCL Digital Experience 8.5, 9.0, and 9.5 deployments.
- Apply any HCL-supported fixes, upgrades, or configuration changes identified by the vendor.
- Prioritize externally exposed portals in normal vulnerability remediation cycles.
- Monitor for unusual error-page traffic or phishing reports involving portal URLs.
Validation and detection
- Confirm whether HCL Digital Experience is deployed and record exact versions.
- Check whether any affected instances are internet-facing.
- Compare installed maintenance levels against HCL KB0100491 guidance.
- Review web access logs for unusual error-response patterns.
- Document remediation status for each affected portal.
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-209: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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-2021-27774 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
- Low
- CVSS
- 3.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
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:R/S:U/C:N/I:L/A:N1.61.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.1LowVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0100491CVE 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.
Generation of Error Message Containing Sensitive Information
Generation of Error Message Containing Sensitive Information represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.