CVE-2012-3871: Cross-site scripting (XSS) vulnerability in data/hybrid/i_hybrid.php in Open Constructor 3.12.0 allows remote

Routine

LOW 3.5DOWNGRADE

CVE-2012-3871 is a low-severity flaw (CVSS 3.5) affecting openconstructor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in data/hybrid/i_hybrid.php in Open Constructor 3.12.0 allows remote authenticated users to inject arbitrary web script or HTML via the header parameter.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	3.5 (Low)
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-79
Published	2012-12-28
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: openconstructor project

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

Am I affected?

Timeline

2012-12-28 11:48 UTCPublished CVE record published
2026-06-16 23:44 UTCUpdated Record last modified

openconstructor project openconstructor DOWNGRADE

Affected: 3.12.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.12.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.12.0 (Debian / Ubuntu)

apt-cache madison openconstructor sudo apt install openconstructor=<VERSION_BEFORE_3.12.0> sudo apt-mark hold openconstructor

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

dnf --showduplicates list openconstructor sudo dnf downgrade openconstructor-<VERSION_BEFORE_3.12.0> sudo dnf versionlock add openconstructor

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-2012-3871?

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

Is CVE-2012-3871 being exploited?

CVE-2012-3871 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-2012-3871 affect?

CVE-2012-3871 affects openconstructor. Severity is low (CVSS 3.5). Cross-site scripting (XSS) vulnerability in data/hybrid/i_hybrid.php in Open Constructor 3.12.0 allows remote authenticated users to inject arbitrary web script or HTML via the header parameter.

How urgent is CVE-2012-3871?

Priority 31/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2012-3873 MEDIUM 6.5 DOWNGRADE Multiple SQL injection vulnerabilities in Open Constructor 3.12.0 allow remote authenticated users to execute
CVE-2012-3872 MEDIUM 4.3 DOWNGRADE Multiple cross-site scripting (XSS) vulnerabilities in Open Constructor 3.12.0 allow remote attackers to injec
CVE-2012-3870 LOW 3.5 DOWNGRADE Multiple cross-site scripting (XSS) vulnerabilities in objects/createobject.php in Open Constructor 3.12.0 all

References

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