THREATPORT/VULNERABILITY/CVE-2003-0870
HIGH SEVERITY

CVE-2003-0870

Opera Browser vulnerability

CVSS
7.5
EPSS
15.1%
EPSS pct
96th
Exploited
No known
Heap-based buffer overflow in Opera 7.11 and 7.20 allows remote attackers to execute arbitrary code via an HREF with a large number of escaped characters in the server name.
Affected vendor
Opera
Affected product
Opera Browser
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness type (CWE)
Published
2003-11-17

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality, partial impact to integrity, partial impact to availability.

Its EPSS score of 15.1% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2003-0870

  • Confirm whether Opera Opera Browser is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2003-0870.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2003-0870

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2003-0870 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2003-0870?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2003-0870.

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