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CVE-2018-5776

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js...

6.1 MediumFix available

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

2.02%Up 1.0 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.1

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

Record
CVE-2018-5776
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness
CWE-79
Updated
2026-11-02
CVE List No score

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

Record
CVE-2018-5776
Updated
2026-11-02
EUVDEUVD-2018-17543 No score

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

Record
EUVD-2018-17543
Updated
2026-11-03
GitHub AdvisoriesGHSA-gmjx-3rgm-r63g 6.1

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js...

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

Record
GHSA-gmjx-3rgm-r63g
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSV 6.1

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

Record
CVE-2018-5776
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2018-5776 6.1

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

Record
DEBIAN-CVE-2018-5776
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2018-5776 6.1

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

Record
UBUNTU-CVE-2018-5776
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
wordpress
Debian:12
 before 4.9.2+dfsg-1
4.9.2+dfsg-1
wordpress
Debian:13
 before 4.9.2+dfsg-1
4.9.2+dfsg-1
wordpress
Debian:14
 before 4.9.2+dfsg-1
4.9.2+dfsg-1
wordpress
Ubuntu:16.04:LTS
 All versions, plus listed versions
4.3+dfsg-14.3.1+dfsg-14.4+dfsg-14.4.1+dfsg-14.4.2+dfsg-14.4.2+dfsg-1ubuntu1
 None known
wordpress
Ubuntu:18.04:LTS
 All versions, plus listed versions
4.8.2+dfsg-24.8.3+dfsg-14.9.1+dfsg-14.9.2+dfsg-14.9.4+dfsg-14.9.5+dfsg1-1
 None known
wordpress
Ubuntu:20.04:LTS
 All versions, plus listed versions
5.2.2+dfsg1-15.2.4+dfsg1-15.3.2+dfsg1-15.3.2+dfsg1-1ubuntu1
 None known
wordpress
Ubuntu:22.04:LTS
 All versions, plus listed versions
5.7.1+dfsg1-2ubuntu15.8.1+dfsg1-2ubuntu15.8.2+dfsg1-1ubuntu15.8.3+dfsg1-1ubuntu15.8.3+dfsg1-1ubuntu1.1
 None known
wordpress
Ubuntu:24.04:LTS
 All versions, plus listed versions
6.2+dfsg1-1ubuntu16.4.3+dfsg1-1ubuntu1
 None known
wordpress
Ubuntu:25.10
 All versions, plus listed versions
6.7.2+dfsg1-1.1ubuntu1
 None known
wordpress
Ubuntu:26.10
 All versions, plus listed versions
6.7.2+dfsg1-1.1ubuntu2
 None known
wordpress
Ubuntu:26.04:LTS
 All versions, plus listed versions
6.7.2+dfsg1-1.1ubuntu16.7.2+dfsg1-1.1ubuntu2
 None known

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-5776 is a medium vulnerability (CVSS 6.1) in Wordpress, published January 18, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.02%, the 81st percentile. Fixed in wordpress 4.9.2+dfsg-1.

References

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