CVE-2015-0820

Mozilla Firefox before 36.0 does not properly restrict transitions of JavaScript objects from a non-extensible state to an extensible state, which allows remote attackers to bypass a Caja Compiler sandbox protection mechanism or a Secure EcmaScript sandbox protection mechanism via a crafted web site.

Published: 2015-02-25 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-0820 is rated Low Risk (27.9/100): CVSS Low severity, with medium exploitation likelihood (EPSS 0.30%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2015-0820

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 2025-03-30 0.60% 0.30% -0.29%
2 2025-03-29 0.29% 0.60% +0.31%
3 2025-03-17 — 0.29% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-0820

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
2.6 2.0 LOW
AV:N/AC:H/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 4.9 2.9 [email protected]

Weakness enumeration for CVE-2015-0820

OS Trackers for CVE-2015-0820

vendor priority summary link
gentoo normal CVE-2015-0820: 1 GLSA(s) (201504-01), 7 atom(s) (dev-libs/nspr, mail-client/thunderbird, …); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-0820
suse high CVE-2015-0820 severity important: SUSE including 60 source package names (MozillaFirefox, MozillaFirefox-102.11.0-150200.152.87.1, …), 94 product×package rows across 24 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (24 product lines)): Fixed 63, Known Not Affected 31. https://www.suse.com/security/cve/CVE-2015-0820/
ubuntu medium CVE-2015-0820 medium priority: Ubuntu including 1 source packages (firefox), 5 status rows across 5 suites (lucid, precise, trusty, upstream, utopic): released 4, ignored 1. https://ubuntu.com/security/CVE-2015-0820

Affected software / configurations for CVE-2015-0820

Vendor Product Version Raw CPE
opensuse opensuse 13.1 cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
opensuse opensuse 13.2 cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
mozilla firefox <= 35.0.1 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozilla firefox 0.1 cpe:2.3:a:mozilla:firefox:0.1:*:*:*:*:*:*:*
mozilla firefox 0.2 cpe:2.3:a:mozilla:firefox:0.2:*:*:*:*:*:*:*
mozilla firefox 0.3 cpe:2.3:a:mozilla:firefox:0.3:*:*:*:*:*:*:*
mozilla firefox 0.4 cpe:2.3:a:mozilla:firefox:0.4:*:*:*:*:*:*:*
mozilla firefox 0.5 cpe:2.3:a:mozilla:firefox:0.5:*:*:*:*:*:*:*
mozilla firefox 0.6 cpe:2.3:a:mozilla:firefox:0.6:*:*:*:*:*:*:*
mozilla firefox 0.6.1 cpe:2.3:a:mozilla:firefox:0.6.1:*:*:*:*:*:*:*
mozilla firefox 0.7 cpe:2.3:a:mozilla:firefox:0.7:*:*:*:*:*:*:*
mozilla firefox 0.7.1 cpe:2.3:a:mozilla:firefox:0.7.1:*:*:*:*:*:*:*
mozilla firefox 0.8 cpe:2.3:a:mozilla:firefox:0.8:*:*:*:*:*:*:*
mozilla firefox 0.9 cpe:2.3:a:mozilla:firefox:0.9:*:*:*:*:*:*:*
mozilla firefox 0.9 cpe:2.3:a:mozilla:firefox:0.9:rc:*:*:*:*:*:*
mozilla firefox 0.9.1 cpe:2.3:a:mozilla:firefox:0.9.1:*:*:*:*:*:*:*
mozilla firefox 0.9.2 cpe:2.3:a:mozilla:firefox:0.9.2:*:*:*:*:*:*:*
mozilla firefox 0.9.3 cpe:2.3:a:mozilla:firefox:0.9.3:*:*:*:*:*:*:*
mozilla firefox 0.10 cpe:2.3:a:mozilla:firefox:0.10:*:*:*:*:*:*:*
mozilla firefox 0.10.1 cpe:2.3:a:mozilla:firefox:0.10.1:*:*:*:*:*:*:*
mozilla firefox 1.0 cpe:2.3:a:mozilla:firefox:1.0:*:*:*:*:*:*:*
mozilla firefox 1.0 cpe:2.3:a:mozilla:firefox:1.0:preview_release:*:*:*:*:*:*
mozilla firefox 1.0.1 cpe:2.3:a:mozilla:firefox:1.0.1:*:*:*:*:*:*:*
mozilla firefox 1.0.2 cpe:2.3:a:mozilla:firefox:1.0.2:*:*:*:*:*:*:*
mozilla firefox 1.0.3 cpe:2.3:a:mozilla:firefox:1.0.3:*:*:*:*:*:*:*
mozilla firefox 1.0.4 cpe:2.3:a:mozilla:firefox:1.0.4:*:*:*:*:*:*:*
mozilla firefox 1.0.5 cpe:2.3:a:mozilla:firefox:1.0.5:*:*:*:*:*:*:*
mozilla firefox 1.0.6 cpe:2.3:a:mozilla:firefox:1.0.6:*:*:*:*:*:*:*
mozilla firefox 1.0.7 cpe:2.3:a:mozilla:firefox:1.0.7:*:*:*:*:*:*:*
mozilla firefox 1.0.8 cpe:2.3:a:mozilla:firefox:1.0.8:*:*:*:*:*:*:*
mozilla firefox 1.4.1 cpe:2.3:a:mozilla:firefox:1.4.1:*:*:*:*:*:*:*
mozilla firefox 1.5 cpe:2.3:a:mozilla:firefox:1.5:*:*:*:*:*:*:*
mozilla firefox 1.5 cpe:2.3:a:mozilla:firefox:1.5:beta1:*:*:*:*:*:*
mozilla firefox 1.5 cpe:2.3:a:mozilla:firefox:1.5:beta2:*:*:*:*:*:*
mozilla firefox 1.5.0.1 cpe:2.3:a:mozilla:firefox:1.5.0.1:*:*:*:*:*:*:*
mozilla firefox 1.5.0.2 cpe:2.3:a:mozilla:firefox:1.5.0.2:*:*:*:*:*:*:*
mozilla firefox 1.5.0.3 cpe:2.3:a:mozilla:firefox:1.5.0.3:*:*:*:*:*:*:*
mozilla firefox 1.5.0.4 cpe:2.3:a:mozilla:firefox:1.5.0.4:*:*:*:*:*:*:*
mozilla firefox 1.5.0.5 cpe:2.3:a:mozilla:firefox:1.5.0.5:*:*:*:*:*:*:*
mozilla firefox 1.5.0.6 cpe:2.3:a:mozilla:firefox:1.5.0.6:*:*:*:*:*:*:*
mozilla firefox 1.5.0.7 cpe:2.3:a:mozilla:firefox:1.5.0.7:*:*:*:*:*:*:*
mozilla firefox 1.5.0.8 cpe:2.3:a:mozilla:firefox:1.5.0.8:*:*:*:*:*:*:*
mozilla firefox 1.5.0.9 cpe:2.3:a:mozilla:firefox:1.5.0.9:*:*:*:*:*:*:*
mozilla firefox 1.5.0.10 cpe:2.3:a:mozilla:firefox:1.5.0.10:*:*:*:*:*:*:*
mozilla firefox 1.5.0.11 cpe:2.3:a:mozilla:firefox:1.5.0.11:*:*:*:*:*:*:*
mozilla firefox 1.5.0.12 cpe:2.3:a:mozilla:firefox:1.5.0.12:*:*:*:*:*:*:*
mozilla firefox 1.5.1 cpe:2.3:a:mozilla:firefox:1.5.1:*:*:*:*:*:*:*
mozilla firefox 1.5.2 cpe:2.3:a:mozilla:firefox:1.5.2:*:*:*:*:*:*:*
mozilla firefox 1.5.3 cpe:2.3:a:mozilla:firefox:1.5.3:*:*:*:*:*:*:*
mozilla firefox 1.5.4 cpe:2.3:a:mozilla:firefox:1.5.4:*:*:*:*:*:*:*
mozilla firefox 1.5.5 cpe:2.3:a:mozilla:firefox:1.5.5:*:*:*:*:*:*:*
mozilla firefox 1.5.6 cpe:2.3:a:mozilla:firefox:1.5.6:*:*:*:*:*:*:*
mozilla firefox 1.5.7 cpe:2.3:a:mozilla:firefox:1.5.7:*:*:*:*:*:*:*
mozilla firefox 1.5.8 cpe:2.3:a:mozilla:firefox:1.5.8:*:*:*:*:*:*:*
mozilla firefox 1.8 cpe:2.3:a:mozilla:firefox:1.8:*:*:*:*:*:*:*
mozilla firefox 2.0 cpe:2.3:a:mozilla:firefox:2.0:*:*:*:*:*:*:*
mozilla firefox 2.0.0.1 cpe:2.3:a:mozilla:firefox:2.0.0.1:*:*:*:*:*:*:*
mozilla firefox 2.0.0.2 cpe:2.3:a:mozilla:firefox:2.0.0.2:*:*:*:*:*:*:*
mozilla firefox 2.0.0.3 cpe:2.3:a:mozilla:firefox:2.0.0.3:*:*:*:*:*:*:*
mozilla firefox 2.0.0.4 cpe:2.3:a:mozilla:firefox:2.0.0.4:*:*:*:*:*:*:*
mozilla firefox 2.0.0.5 cpe:2.3:a:mozilla:firefox:2.0.0.5:*:*:*:*:*:*:*
mozilla firefox 2.0.0.6 cpe:2.3:a:mozilla:firefox:2.0.0.6:*:*:*:*:*:*:*
mozilla firefox 2.0.0.7 cpe:2.3:a:mozilla:firefox:2.0.0.7:*:*:*:*:*:*:*
mozilla firefox 2.0.0.8 cpe:2.3:a:mozilla:firefox:2.0.0.8:*:*:*:*:*:*:*
mozilla firefox 2.0.0.9 cpe:2.3:a:mozilla:firefox:2.0.0.9:*:*:*:*:*:*:*
mozilla firefox 2.0.0.10 cpe:2.3:a:mozilla:firefox:2.0.0.10:*:*:*:*:*:*:*
mozilla firefox 2.0.0.11 cpe:2.3:a:mozilla:firefox:2.0.0.11:*:*:*:*:*:*:*
mozilla firefox 2.0.0.12 cpe:2.3:a:mozilla:firefox:2.0.0.12:*:*:*:*:*:*:*
mozilla firefox 2.0.0.13 cpe:2.3:a:mozilla:firefox:2.0.0.13:*:*:*:*:*:*:*
mozilla firefox 2.0.0.14 cpe:2.3:a:mozilla:firefox:2.0.0.14:*:*:*:*:*:*:*
mozilla firefox 2.0.0.15 cpe:2.3:a:mozilla:firefox:2.0.0.15:*:*:*:*:*:*:*
mozilla firefox 2.0.0.16 cpe:2.3:a:mozilla:firefox:2.0.0.16:*:*:*:*:*:*:*
mozilla firefox 2.0.0.17 cpe:2.3:a:mozilla:firefox:2.0.0.17:*:*:*:*:*:*:*
mozilla firefox 2.0.0.18 cpe:2.3:a:mozilla:firefox:2.0.0.18:*:*:*:*:*:*:*
mozilla firefox 2.0.0.19 cpe:2.3:a:mozilla:firefox:2.0.0.19:*:*:*:*:*:*:*
mozilla firefox 2.0.0.20 cpe:2.3:a:mozilla:firefox:2.0.0.20:*:*:*:*:*:*:*
mozilla firefox 3.0 cpe:2.3:a:mozilla:firefox:3.0:*:*:*:*:*:*:*
mozilla firefox 3.0.1 cpe:2.3:a:mozilla:firefox:3.0.1:*:*:*:*:*:*:*
mozilla firefox 3.0.2 cpe:2.3:a:mozilla:firefox:3.0.2:*:*:*:*:*:*:*
mozilla firefox 3.0.3 cpe:2.3:a:mozilla:firefox:3.0.3:*:*:*:*:*:*:*

References for CVE-2015-0820

cvelogic Threat Intelligence