CVE-2011-2486: nspluginwrapper before 1.4.4 does not properly provide access to NPNVprivateModeBool variable settings, which

Routine

MEDIUM 5.0DOWNGRADE

CVE-2011-2486 is a medium-severity flaw (CVSS 5.0) affecting nspluginwrapper. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

nspluginwrapper before 1.4.4 does not properly provide access to NPNVprivateModeBool variable settings, which could prevent Firefox plugins from determining if they should run in Private Browsing mode and allow remote attackers to bypass intended access restrictions, as demonstrated using Flash.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-264
Published	2012-11-19
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: nspluginwrapper

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2012-11-19 12:10 UTCPublished CVE record published
2026-06-16 23:31 UTCUpdated Record last modified

nspluginwrapper nspluginwrapper DOWNGRADE

Affected: 1.4.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4.2

1. Check installed version

apt-cache policy nspluginwrapper || rpm -q nspluginwrapper || nspluginwrapper --version

2. No fixed release: DOWNGRADE to a release before 1.4.2 (Debian / Ubuntu)

apt-cache madison nspluginwrapper sudo apt install nspluginwrapper=<VERSION_BEFORE_1.4.2> sudo apt-mark hold nspluginwrapper

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list nspluginwrapper sudo dnf downgrade nspluginwrapper-<VERSION_BEFORE_1.4.2> sudo dnf versionlock add nspluginwrapper

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2011-2486?

nspluginwrapper: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-2486 being exploited?

CVE-2011-2486 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2011-2486 affect?

CVE-2011-2486 affects nspluginwrapper. Severity is medium (CVSS 5.0). nspluginwrapper before 1.4.4 does not properly provide access to NPNVprivateModeBool variable settings, which could prevent Firefox plugins from determining if they should run in Private Browsing mode and allow remote attackers to bypass in

How urgent is CVE-2011-2486?

Priority 39/100. No elevated risk signals yet.

Software pages

Mozilla Firefox vulnerabilities

References

← Back to latest CVEs