CVE-2010-4877: Cross-site scripting (XSS) vulnerability in index.php in OneCMS 2.6.1 allows remote attackers to inject arbitr

Routine

MEDIUM 4.3DOWNGRADE

CVE-2010-4877 is a medium-severity flaw (CVSS 4.3) affecting onecms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in index.php in OneCMS 2.6.1 allows remote attackers to inject arbitrary web script or HTML via the view parameter.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-79
Published	2011-10-07
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: insanevisions

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

Am I affected?

Timeline

2011-10-07 10:55 UTCPublished CVE record published
2026-06-16 23:25 UTCUpdated Record last modified

insanevisions onecms DOWNGRADE

Affected: 2.6.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.6.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.6.1 (Debian / Ubuntu)

apt-cache madison onecms sudo apt install onecms=<VERSION_BEFORE_2.6.1> sudo apt-mark hold onecms

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

dnf --showduplicates list onecms sudo dnf downgrade onecms-<VERSION_BEFORE_2.6.1> sudo dnf versionlock add onecms

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: OneCMS 2.6.1 - 'index.php' 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-2010-4877?

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

Is CVE-2010-4877 being exploited?

CVE-2010-4877 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-2010-4877 affect?

CVE-2010-4877 affects onecms. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in index.php in OneCMS 2.6.1 allows remote attackers to inject arbitrary web script or HTML via the view parameter.

How urgent is CVE-2010-4877?

Priority 39/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2010-0952 MEDIUM 6.8 DOWNGRADE SQL injection vulnerability in index.php in OneCMS 2.5, when magic_quotes_gpc is disabled, allows remote attac
CVE-2008-7209 HIGH 7.5 UPGRADE Unrestricted file upload vulnerability in the add2 action in a_upload.php in OneCMS 2.4, and possibly earlier,
CVE-2008-7208 MEDIUM 6.8 UPGRADE Multiple SQL injection vulnerabilities in OneCMS 2.4, and possibly earlier, allow remote attackers to execute
CVE-2008-6652 HIGH 7.5 DOWNGRADE SQL injection vulnerability in asd.php in OneCMS 2.5 allows remote attackers to execute arbitrary SQL commands
CVE-2008-2482 HIGH 7.5 DOWNGRADE Directory traversal vulnerability in install_mod.php in insanevisions OneCMS 2.5 allows remote attackers to in

References

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