CVE-2018-1000509: Redirection version 2.7.1 contains a Serialisation vulnerability possibly allowing ACE vulnerability in Settin

This month

HIGH 7.2DOWNGRADE

CVE-2018-1000509 is a high-severity flaw (CVSS 7.2) affecting redirection. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Redirection version 2.7.1 contains a Serialisation vulnerability possibly allowing ACE vulnerability in Settings page AJAX that can result in could allow admin to execute arbitrary code in some circumstances. This attack appear to be exploitable via Attacker must have access to admin account. This vulnerability appears to have been fixed in 2.8.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	2.1% (top 19%)
CISA exploited list	No
Weakness	CWE-502
Published	2018-06-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: redirection

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

Am I affected?

Timeline

2018-06-26 16:29 UTCPublished CVE record published
2026-06-17 01:32 UTCUpdated Record last modified

redirection redirection DOWNGRADE

Affected: 2.7.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.7.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.7.1 (Debian / Ubuntu)

apt-cache madison redirection sudo apt install redirection=<VERSION_BEFORE_2.7.1> sudo apt-mark hold redirection

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

dnf --showduplicates list redirection sudo dnf downgrade redirection-<VERSION_BEFORE_2.7.1> sudo dnf versionlock add redirection

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-2018-1000509?

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

Is CVE-2018-1000509 being exploited?

CVE-2018-1000509 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-2018-1000509 affect?

CVE-2018-1000509 affects redirection. Severity is high (CVSS 7.2). Redirection version 2.7.1 contains a Serialisation vulnerability possibly allowing ACE vulnerability in Settings page AJAX that can result in could allow admin to execute arbitrary code in some circumstances. This attack appear to be exploi

How urgent is CVE-2018-1000509?

Priority 51/100. High severity; Public exploit reference

Related CVEs

CVE-2023-3977 MEDIUM 4.3 UPGRADE UPGRADE Several plugins for WordPress by Inisev are vulnerable to Cross-Site Request Forgery to unauthorized installat
CVE-2023-1331 MEDIUM 6.5 UPGRADE The Redirection WordPress plugin before 1.1.5 does not have CSRF checks in the uninstall action, which could a
CVE-2023-1330 MEDIUM 6.5 UPGRADE The Redirection WordPress plugin before 1.1.4 does not add nonce verification in place when adding the redirec
CVE-2023-0958 MEDIUM 4.3 UPGRADE UPGRADE Several plugins for WordPress by Inisev are vulnerable to unauthorized installation of plugins due to a missin
CVE-2018-1000504 HIGH 7.2 DOWNGRADE Redirection version 2.7.3 contains a ACE via file inclusion vulnerability in Pass-through mode that can result

References

← Back to latest CVEs