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CVE Record

CVE-2010-4580: Opera before 11.00 does not clear WAP WML form fields after manual navigation to a new web site, which allo...

Opera before 11.00 does not clear WAP WML form fields after manual navigation to a new web site, which allows remote attackers to obtain sensitive information via an input field that has the same name as an input field on a previously visited web site.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's Takemoderate

Analyst readout for executives and security teams

Plain-English summary

This is a legacy Opera browser privacy flaw. Before Opera 11.00, WAP WML form data was not cleared after a user manually navigated to another site. A malicious site could read sensitive data if it used an input field with the same name as one on the previous WML site.

Executive priority

Treat this as a targeted legacy cleanup item, not an emergency. Prioritize if old Opera browsers exist in regulated, kiosk, or shared-user environments where form data could include credentials or personal information.

Technical view

The issue is client-side state leakage in Opera before 11.00 affecting WAP WML forms. Form field values persisted across manual navigation and could be exposed to a later site through same-named input fields. Sources identify Opera 11.00 changelogs and support content, but the bundle does not provide CVSS, CWE, or detailed patch mechanics.

Likely exposure

Exposure is mainly legacy endpoints still using Opera versions earlier than 11.00 with WAP WML browsing workflows. Modern environments are unlikely to be affected unless old browser packages remain in managed images, kiosks, or unsupported systems.

Exploitation context

The bundle does not show CISA KEV listing or active exploitation evidence. Exploitation would require a vulnerable Opera user to browse from a WML form site to an attacker-controlled site with matching input field names.

Researcher notes

The evidence supports an information disclosure flaw fixed around Opera 11.00. The source bundle lacks CVSS, CWE, affected CPEs, and exploit telemetry. Avoid broad product claims beyond Opera before 11.00 and WAP WML form-field persistence.

Mitigation direction

  • Upgrade Opera clients to version 11.00 or later where supported.
  • Remove unsupported Opera versions from managed endpoints and legacy images.
  • Check vendor guidance and distribution advisories for platform-specific package updates.
  • Restrict use of legacy WAP WML workflows where old browsers cannot be replaced.

Validation and detection

  • Inventory endpoints for Opera versions earlier than 11.00.
  • Review managed software images for bundled legacy Opera packages.
  • Confirm browser update status on kiosks, thin clients, and unsupported systems.
  • Check whether any business workflows still depend on WAP WML forms.
Prepared
Confidence
medium
Sources
8

Public sources used

Based on public source material and reviewed before publication.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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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
7Source 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

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