CVE-2012-5181: Cross-site scripting (XSS) vulnerability in concrete5 Japanese 5.5.1 through 5.5.2.1 and concrete5 English 5.5

Routine

MEDIUM 4.3DOWNGRADE

CVE-2012-5181 is a medium-severity flaw (CVSS 4.3) affecting concrete5. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in concrete5 Japanese 5.5.1 through 5.5.2.1 and concrete5 English 5.5.0 through 5.6.0.2 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-79
Published	2012-12-21
Last modified	2026-06-16

Publisher (CNA): JPCERT/CC · Vendor: concrete5

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

Am I affected?

Timeline

2012-12-21 21:55 UTCPublished CVE record published
2026-06-16 23:46 UTCUpdated Record last modified

concrete5 concrete5 DOWNGRADE

Affected: 5.5.0 · 5.5.1 · 5.5.2 · 5.5.2.1 · 5.6.0 · 5.6.0.1 · 5.6.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.5.0

1. Check installed version

apt-cache policy concrete5 || rpm -q concrete5 || concrete5 --version

2. No fixed release: DOWNGRADE to a release before 5.5.0 (Debian / Ubuntu)

apt-cache madison concrete5 sudo apt install concrete5=<VERSION_BEFORE_5.5.0> sudo apt-mark hold concrete5

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

dnf --showduplicates list concrete5 sudo dnf downgrade concrete5-<VERSION_BEFORE_5.5.0> sudo dnf versionlock add concrete5

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-2012-5181?

concrete5: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2012-5181 being exploited?

CVE-2012-5181 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-2012-5181 affect?

CVE-2012-5181 affects concrete5. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in concrete5 Japanese 5.5.1 through 5.5.2.1 and concrete5 English 5.5.0 through 5.6.0.2 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

How urgent is CVE-2012-5181?

Priority 33/100. No elevated risk signals yet.

Related CVEs

CVE-2017-6908 MEDIUM 6.1 UPGRADE An issue was discovered in concrete5 <= 5.6.3.4
CVE-2017-6905 MEDIUM 6.1 UPGRADE An issue was discovered in concrete5 <= 5.6.3.4
CVE-2015-3989 MEDIUM 4.3 UPGRADE Multiple cross-site scripting (XSS) vulnerabilities in concrete5 before 5.7.4 allow remote attackers to inject
CVE-2015-2250 MEDIUM 4.3 UPGRADE Multiple cross-site scripting (XSS) vulnerabilities in concrete5 before 5.7.4 allow remote attackers to inject
CVE-2014-9526 MEDIUM 4.3 UPGRADE DOWNGRADE Multiple cross-site scripting (XSS) vulnerabilities in concrete5 5.7.2.1, 5.7.2, and earlier allow remote atta

References

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