Is CVE-2015-8833 in the CISA KEV catalog?

No. CVE-2015-8833 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-8833?

CVE-2015-8833 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2015-8833?

CVE-2015-8833 has an EPSS score of 7.03% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-8833?

Upgrade pidgin-otr on debian 11 to 4.0.2-1 or later.

CVE & CISA-KEV Catalog

CVE-2015-8833

CRITICALEPSS 93th pctl

9.8

CVSS v3

NVD

Description

Use-after-free vulnerability in the create_smp_dialog function in gtk-dialog.c in the Off-the-Record Messaging (OTR) pidgin-otr plugin before 4.0.2 for Pidgin allows remote attackers to execute arbitrary code via vectors related to the "Authenticate buddy" menu item.

How to fix

Remediation Available

pidgin-otrDebian

Fixed in:4.0.2-1CVE-2015-8833

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

7.03%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Other references12

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.