CVE-2013-5961: Unrestricted file upload vulnerability in lazyseo.php in the Lazy SEO plugin 1.1.9 for WordPress allows remote

This month

MEDIUM 6.8DOWNGRADE

CVE-2013-5961 is a medium-severity flaw (CVSS 6.8) affecting lazy seo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unrestricted file upload vulnerability in lazyseo.php in the Lazy SEO plugin 1.1.9 for WordPress allows remote attackers to execute arbitrary PHP code by uploading a PHP file, then accessing it via a direct request to the file in lazy-seo/.

Why this priority

EPSS top 7%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	5.5% (top 7%)
CISA exploited list	No
Published	2013-09-30
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: danny morris

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-09-30 22:55 UTCPublished CVE record published
2026-06-16 23:59 UTCUpdated Record last modified

danny morris lazy seo DOWNGRADE

Affected: 1.1.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.9

1. Check installed version

apt-cache policy lazy-seo || rpm -q lazy-seo || lazy-seo --version

2. No fixed release: DOWNGRADE to a release before 1.1.9 (Debian / Ubuntu)

apt-cache madison lazy-seo sudo apt install lazy-seo=<VERSION_BEFORE_1.1.9> sudo apt-mark hold lazy-seo

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

dnf --showduplicates list lazy-seo sudo dnf downgrade lazy-seo-<VERSION_BEFORE_1.1.9> sudo dnf versionlock add lazy-seo

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: WordPress Plugin Lazy SEO 1.1.9 - Arbitrary File Upload

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-2013-5961?

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

Is CVE-2013-5961 being exploited?

CVE-2013-5961 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-2013-5961 affect?

CVE-2013-5961 affects lazy seo. Severity is medium (CVSS 6.8). Unrestricted file upload vulnerability in lazyseo.php in the Lazy SEO plugin 1.1.9 for WordPress allows remote attackers to execute arbitrary PHP code by uploading a PHP file, then accessing it via a direct request to the file in lazy-seo/.

How urgent is CVE-2013-5961?

Priority 52/100. EPSS top 7%: very likely to be exploited; Public exploit reference

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

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