CVE-2013-5099: Cross-site scripting (XSS) vulnerability in article.php in Anchor CMS 0.9.1, when comments are enabled, allows

Routine

LOW 2.6DOWNGRADE

CVE-2013-5099 is a low-severity flaw (CVSS 2.6) affecting anchor cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in article.php in Anchor CMS 0.9.1, when comments are enabled, allows remote attackers to inject arbitrary web script or HTML via the Name field. NOTE: some sources have reported that comments.php is vulnerable, but certain functions from comments.php are used by article.php.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	2.6 (Low)
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-79
Published	2013-08-09
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: anchor

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

Am I affected?

Timeline

2013-08-09 21:55 UTCPublished CVE record published
2026-06-16 23:58 UTCUpdated Record last modified

anchor anchor cms DOWNGRADE

Affected: 0.9.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.1

1. Check installed version

apt-cache policy anchor-cms || rpm -q anchor-cms || anchor-cms --version

2. No fixed release: DOWNGRADE to a release before 0.9.1 (Debian / Ubuntu)

apt-cache madison anchor-cms sudo apt install anchor-cms=<VERSION_BEFORE_0.9.1> sudo apt-mark hold anchor-cms

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

dnf --showduplicates list anchor-cms sudo dnf downgrade anchor-cms-<VERSION_BEFORE_0.9.1> sudo dnf versionlock add anchor-cms

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: Anchor CMS 0.9.1 - Persistent Cross-Site Scripting

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-2013-5099?

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

Is CVE-2013-5099 being exploited?

CVE-2013-5099 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-2013-5099 affect?

CVE-2013-5099 affects anchor cms. Severity is low (CVSS 2.6). Cross-site scripting (XSS) vulnerability in article.php in Anchor CMS 0.9.1, when comments are enabled, allows remote attackers to inject arbitrary web script or HTML via the Name field. NOTE: some sources have reported that comments.php i

How urgent is CVE-2013-5099?

Priority 33/100. Public exploit reference

Software pages

PHP vulnerabilities

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References

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