CVE-2009-4102

Sage vulnerability

CVSS

9.3

EPSS

3.4%

EPSS pct

88th

Exploited

No known

Sage 1.4.3 and earlier extension for Firefox performs certain operations with chrome privileges, which allows remote attackers to execute arbitrary commands and perform cross-domain scripting attacks via the description tag of an RSS feed.

Affected vendor

Sage.Mozdev

Affected product

Sage

CVSS vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Weakness type (CWE)

CWE-20 — Improper Input Validation

Published

2009-11-29

Risk analysis

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

Its EPSS score of 3.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2009-4102

Confirm whether Sage.Mozdev Sage is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2009-4102.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-4102

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2009-4102 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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