CVE-2011-2943

mediumpriority · track · 18EPSS 0.036 · 89 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.60% (89th) EPSS

CVSS 4.3 · medium

Is it mine?

47 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

The irc_msg_who function in msgs.c in the IRC protocol plugin in libpurple 2.8.0 through 2.9.0 in Pidgin before 2.10.0 does not properly validate characters in nicknames, which allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted nickname that is not properly handled in a WHO response.

cvss

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.7–4.3

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v2.03.7lowAV:N/AC:M/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-476USLLM-inferred

affected products (47)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
pidgin libpurple= 2.8.0nvdUScpe:2.3:a:pidgin:libpurple:*:*:*:*:*:*:*:*
pidgin libpurple= 2.9.0nvdUScpe:2.3:a:pidgin:libpurple:*:*:*:*:*:*:*:*
pidgin pidgin≤ 2.9.0nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.0.0nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.0.1nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.0.2nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.1.0nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.1.1nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.2.0nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.2.1nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.2.2nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.3.0nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.3.1nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.4.0nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.4.1nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.4.2nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.4.3nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.5.0nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
pidgin pidgin= 2.5.1nvdUScpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*

showing 20 of 47

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2011-08-29modified 2026-06-16

references (34)

External citations — patches, advisories, analysis.

scry

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