How severe is CVE-2011-4602?

CVE-2011-4602 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-4602 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4602?

CVE-2011-4602 primarily affects Pidgin. In total, 45 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4602?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-4602 published?

CVE-2011-4602 was published on 2011-12-17 and last updated on 2026-06-16.

CVE-2011-4602

CVE-2011-4602 is a medium-severity vulnerability in Pidgin with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Pidgin
Published: 2011-12-17
Last modified: 2026-06-16

Description

The XMPP protocol plugin in libpurple in Pidgin before 2.10.1 does not properly handle missing fields in (1) voice-chat and (2) video-chat stanzas, which allows remote attackers to cause a denial of service (application crash) via a crafted message.

Frequently asked questions

What is CVE-2011-4602?: The XMPP protocol plugin in libpurple in Pidgin before 2.10.1 does not properly handle missing fields in (1) voice-chat and (2) video-chat stanzas, which allows remote attackers to cause a denial of service (application crash) via a crafted message.
How severe is CVE-2011-4602?: CVE-2011-4602 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-4602 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4602?: CVE-2011-4602 primarily affects Pidgin. In total, 45 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4602?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4602 published?: CVE-2011-4602 was published on 2011-12-17 and last updated on 2026-06-16.

References

Affected products (45)

cpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.2.0:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.2.2:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.3.0:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.3.1:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.4.0:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.4.1:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.4.2:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.4.3:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.5.0:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.5.1:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.5.2:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.5.3:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.5.4:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.5.5:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.5.6:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.5.7:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.5.8:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.5.9:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.6.0:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.6.1:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.6.2:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.6.3:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.6.4:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.6.5:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.6.6:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.7.1:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.7.2:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.7.3:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.7.4:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.7.5:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.7.6:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.7.7:*:*:*:*:*:*:*
cpe:2.3:a:pidgin:pidgin:2.7.8:*:*:*:*:*:*:*

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