CVE-2021-29827
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIBM InfoSphere Information Server 11.7 could allow a remote attacker to hijack the clicking action of the victim. By persuading a victim to visit a malicious Web site, a remote attacker could exploit this vulnerability to hijack the victim's click actions and possibly launch further attacks against the victim.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThis is a Clickjacking vulnerability in IBM InfoSphere Information Server 11.7. An attacker can embed the vulnerable application in a transparent iframe on a malicious website, tricking users into clicking unintended actions. The CVSS 5.2 reflects medium severity with user interaction required and low confidentiality/availability impact.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 11.7CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify IBM InfoSphere Information Server versionCheck the installed version of IBM InfoSphere Information Server against the affected version 11.7. Use your system inventory or version check command to confirm the exact version number.Affected if The installed version is exactly 11.7.
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Inspect HTTP response headers for X-Frame-OptionsSend a request to the IBM InfoSphere web interface and examine the HTTP response headers for the presence of X-Frame-Options header.Affected if X-Frame-Options header is missing or set to a permissive value such as ALLOW-FROM (not DENY or SAMEORIGIN).
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Inspect Content-Security-Policy for frame-ancestorsExamine the HTTP response headers from the application for a Content-Security-Policy header that includes the frame-ancestors directive.Affected if Content-Security-Policy header is absent or does not include frame-ancestors directive to restrict framing.
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Verify iframe embedding is possibleAttempt to access the IBM InfoSphere application from a third-party domain embedded in an iframe, or analyze if the application serves content that can be framed by arbitrary origins.Affected if The application can be embedded in a transparent iframe from an external website without restrictions.
A user is affected if they are running IBM InfoSphere Information Server version 11.7 and the application lacks proper X-Frame-Options or Content-Security-Policy frame-ancestors protections, allowing it to be embedded in iframes by malicious sites.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement X-Frame-Options: DENY or SAMEORIGIN header, or Content-Security-Policy with frame-ancestors directive, at the web server or application server level to prevent the application from being embedded in iframes.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,848.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-29827 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-29827 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data