How severe is CVE-2015-3439?

CVE-2015-3439 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-3439 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3439?

CVE-2015-3439 primarily affects Debian Debian Linux. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-3439?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-3439 published?

CVE-2015-3439 was published on 2015-08-05 and last updated on 2026-06-17.

CVE-2015-3439

CVE-2015-3439 is a medium-severity vulnerability in Debian Debian Linux with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Debian Debian Linux
Published: 2015-08-05
Last modified: 2026-06-17

Description

Cross-site scripting (XSS) vulnerability in the Ephox (formerly Moxiecode) plupload.flash.swf shim 2.1.2 in Plupload, as used in WordPress 3.9.x, 4.0.x, and 4.1.x before 4.1.2 and other products, allows remote attackers to execute same-origin JavaScript functions via the target parameter, as demonstrated by executing a certain click function, related to _init.as and _fireEvent.as.

Frequently asked questions

What is CVE-2015-3439?: Cross-site scripting (XSS) vulnerability in the Ephox (formerly Moxiecode) plupload.flash.swf shim 2.1.2 in Plupload, as used in WordPress 3.9.x, 4.0.x, and 4.1.x before 4.1.2 and other products, allows remote attackers to execute same-origin JavaScript functions via the target parameter, as demonstrated by executing a certain click function, related to _init.as and _fireEvent.as.
How severe is CVE-2015-3439?: CVE-2015-3439 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-3439 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-3439?: CVE-2015-3439 primarily affects Debian Debian Linux. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-3439?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-3439 published?: CVE-2015-3439 was published on 2015-08-05 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:a:wordpress:wordpress:3.9.0:*:*:*:*:*:*:*
cpe:2.3:a:wordpress:wordpress:3.9.1:*:*:*:*:*:*:*
cpe:2.3:a:wordpress:wordpress:3.9.2:*:*:*:*:*:*:*
cpe:2.3:a:wordpress:wordpress:3.9.3:*:*:*:*:*:*:*
cpe:2.3:a:wordpress:wordpress:4.0:*:*:*:*:*:*:*
cpe:2.3:a:wordpress:wordpress:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:wordpress:wordpress:4.1:*:*:*:*:*:*:*
cpe:2.3:a:wordpress:wordpress:4.1.1:*:*:*:*:*:*:*

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