CVE-2007-4999

libpurple in Pidgin 2.1.0 through 2.2.1, when using HTML logging, allows remote attackers to cause a denial of service (NULL dereference and application crash) via a message that contains invalid HTML data, a different vector than CVE-2007-4996.

Published: 2007-10-29 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-4999 is rated Moderate Risk (44/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.81%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2007-4999

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.54% 1.81% +0.27%
2 2026-01-13 1.56% 1.54% -0.02%
3 2025-11-23 — 1.56% —

Full EPSS history (15 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-4999

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2007-4999

OS Trackers for CVE-2007-4999

vendor priority summary link
debian medium CVE-2007-4999 medium priority: Debian including 1 source packages (pidgin), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2007-4999
redhat — — https://access.redhat.com/security/cve/CVE-2007-4999
ubuntu low CVE-2007-4999 low priority: Ubuntu including 1 source packages (pidgin), 5 status rows across 5 suites (dapper, edgy, feisty, gutsy, upstream): DNE 3, released 2. https://ubuntu.com/security/CVE-2007-4999

Vendor comments (NVD) for CVE-2007-4999

  • Red Hat (2007-11-01T00:00:00)

    Not vulnerable. This issue did not affect the versions of Pidgin or Gaim as shipped with Red Hat Enterprise Linux 2.1, 3, 4, or 5.

Affected software / configurations for CVE-2007-4999

Vendor Product Version Raw CPE
pidgin pidgin 2.1.0 cpe:2.3:a:pidgin:pidgin:2.1.0:*:*:*:*:*:*:*
pidgin pidgin 2.2.0 cpe:2.3:a:pidgin:pidgin:2.2.0:*:*:*:*:*:*:*
pidgin pidgin 2.2.1 cpe:2.3:a:pidgin:pidgin:2.2.1:*:*:*:*:*:*:*

References for CVE-2007-4999

cvelogic Threat Intelligence