CVE-2016-10926: The nelio-ab-testing plugin before 4.5.9 for WordPress has SSRF in ajax/iesupport.php.

Q: How do I fix CVE-2016-10926?

nelio ab testing: upgrade to 4.5.9. Exact commands for each OS are on this page.

Q: Is CVE-2016-10926 being exploited?

CVE-2016-10926 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-2016-10926 affect?

CVE-2016-10926 affects nelio ab testing. Severity is critical (CVSS 10.0). The nelio-ab-testing plugin before 4.5.9 for WordPress has SSRF in ajax/iesupport.php.

Q: How urgent is CVE-2016-10926?

Priority 59/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 10.0REMOTEUPGRADE

CVE-2016-10926 is a critical-severity flaw (CVSS 10.0) affecting nelio ab testing. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The nelio-ab-testing plugin before 4.5.9 for WordPress has SSRF in ajax/iesupport.php.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-918
Published	2019-08-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: neliosoftware

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

Am I affected?

Timeline

2019-08-22 14:15 UTCPublished CVE record published
2026-06-17 00:40 UTCUpdated Record last modified

neliosoftware nelio ab testing UPGRADE

Affected: < 4.5.9

Fixed in: 4.5.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nelio-ab-testing || rpm -q nelio-ab-testing || nelio-ab-testing --version

2. UPGRADE to 4.5.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nelio-ab-testing

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nelio-ab-testing

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-2016-10926?

nelio ab testing: upgrade to 4.5.9. Exact commands for each OS are on this page.

Is CVE-2016-10926 being exploited?

CVE-2016-10926 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-2016-10926 affect?

CVE-2016-10926 affects nelio ab testing. Severity is critical (CVSS 10.0). The nelio-ab-testing plugin before 4.5.9 for WordPress has SSRF in ajax/iesupport.php.

How urgent is CVE-2016-10926?

Priority 59/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities · PHP vulnerabilities

Related CVEs

CVE-2017-18547 HIGH 8.8 UPGRADE The nelio-ab-testing plugin before 4.6.4 for WordPress has CSRF in experiment forms.
CVE-2016-10977 MEDIUM 6.5 UPGRADE The nelio-ab-testing plugin before 4.5.0 for WordPress has filename=..%2f directory traversal.
CVE-2016-10927 CRITICAL 10.0 UPGRADE The nelio-ab-testing plugin before 4.5.11 for WordPress has SSRF in ajax/iesupport.php.

References

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