Security readout for executives and security teams
Plain-English summary
CVE-2021-35496 is an XML External Entity issue in TIBCO JasperReports Server's XMLA Connections component. A low-privileged network attacker may interfere with XML processing, with potential confidentiality, integrity, and availability impact. The public sources rate it high severity but describe exploitation as difficult.
Executive priority
Treat this as a high-priority remediation item for environments running affected JasperReports versions, especially externally reachable reporting portals. The available evidence does not show active exploitation, but the possible business impact spans data exposure, tampering, and service disruption.
Technical view
Affected JasperReports Server editions and deployments include multiple 7.x releases through listed version ranges. The CVSS 3.1 vector is 7.5 high: network reachable, high complexity, low privileges, no user interaction, unchanged scope, and high CIA impact. The source bundle does not provide CWE mapping, exploit details, or fixed-version guidance.
Likely exposure
Exposure is most likely where affected TIBCO JasperReports Server 7.x instances are reachable by authenticated low-privileged users over the network, especially installations using or exposing XMLA Connections. Confirm edition and version because affected ranges differ by packaging and marketplace deployment.
Exploitation context
The provided sources do not indicate known active exploitation, and CISA KEV status is false. The CVSS vector says exploitation requires low privileges and high attack complexity, so urgency comes from impact potential rather than confirmed exploitation evidence.
Researcher notes
The source bundle identifies the vulnerable component and affected release families but omits fixed versions, CWE classification, and exploit mechanics. Avoid assuming generic XXE behavior beyond the stated XML processing interference. Validate exposure through version, edition, reachability, and vendor advisory review.
Mitigation direction
- Check TIBCO support advisories for fixed releases or vendor-approved workarounds.
- Inventory all JasperReports Server editions, including cloud marketplace and embedded deployments.
- Restrict network access to JasperReports Server and XMLA-related interfaces.
- Limit low-privileged accounts to users with a current business need.
- Prioritize upgrades or mitigations first on internet-facing or broadly reachable systems.
Validation and detection
- Confirm product edition and version against the affected ranges in the CVE record.
- Identify whether XMLA Connections are enabled or reachable in each deployment.
- Review authentication paths for low-privileged users who can reach JasperReports Server.
- Verify applied fixes or mitigations against TIBCO advisory guidance.
- Monitor logs for unusual XMLA or XML processing errors.
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-2021-35496 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
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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:L/UI:N/S:U/C:H/I:H/A:H1.65.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.tibco.com/services/support/advisoriesCVE 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.