CVE-2021-33697Network attack vector

User redirection via retained window.opener access

Published Sep 15, 2021 · Updated Aug 3, 2024

Reverse tabnabbing in SAP BusinessObjects Business Intelligence Platform 420 and 430 allows remote attackers to redirect users to malicious sites. A page opened from the SAPUI5 interface retains window.opener access, allowing the linked page to navigate the original browsing context to a phishing page. Exploitation requires a user to open an attacker-controlled link, and the reported consequence is phishing or delivery of content from an untrusted site.

CVSS severity4.7
Medium
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reverse tabnabbing in SAP BusinessObjects Business Intelligence Platform 420 and 430 allows remote attackers to redirect users to malicious sites. A page opened from the SAPUI5 interface retains window.opener access, allowing the linked page to navigate the original browsing context to a phishing page. Exploitation requires a user to open an attacker-controlled link, and the reported consequence is phishing or delivery of content from an untrusted site.

The record

CVE
CVE-2021-33697
Published
Sep 15, 2021
Updated
Aug 3, 2024
Vendor
SAP SE
Product
SAP BusinessObjects Business Intelligence Platform
Classifications
CWE-1022, CWE-269, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 420
  2. Affected versionversion=< 430

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SAP SE · SAP BusinessObjects Business Intelligence Platformversion=< 420; version=< 430

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.7SAP SECVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
5.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1022Use of Web Link to Untrusted Target with window.opener Access
CWE-269Improper Privilege Management
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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