CVE-2015-9320: The option-tree plugin before 2.5.4 for WordPress has XSS related to add_query_arg.

Q: How do I fix CVE-2015-9320?

optiontree: upgrade to 2.5.4. Exact commands for each OS are on this page.

Q: Is CVE-2015-9320 being exploited?

CVE-2015-9320 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2015-9320 affect?

CVE-2015-9320 affects optiontree. Severity is medium (CVSS 6.1). The option-tree plugin before 2.5.4 for WordPress has XSS related to add_query_arg.

Q: How urgent is CVE-2015-9320?

Priority 36/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2015-9320 is a medium-severity flaw (CVSS 6.1) affecting optiontree. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The option-tree plugin before 2.5.4 for WordPress has XSS related to add_query_arg.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-08-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: optiontree project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-08-20 16:15 UTCPublished CVE record published
2026-06-17 00:36 UTCUpdated Record last modified

optiontree project optiontree UPGRADE

Affected: < 2.5.4

Fixed in: 2.5.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.5.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade optiontree

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade optiontree

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2015-9320?

optiontree: upgrade to 2.5.4. Exact commands for each OS are on this page.

Is CVE-2015-9320 being exploited?

CVE-2015-9320 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-2015-9320 affect?

CVE-2015-9320 affects optiontree. Severity is medium (CVSS 6.1). The option-tree plugin before 2.5.4 for WordPress has XSS related to add_query_arg.

How urgent is CVE-2015-9320?

Priority 36/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

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References

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