Is CVE-2012-3527 in the CISA KEV catalog?

No. CVE-2012-3527 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2012-3527?

CVE-2012-3527 has a CVSS v2 base score of 4.6 (MEDIUM).

What is the EPSS score for CVE-2012-3527?

CVE-2012-3527 has an EPSS score of 2.12% (80th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2012-3527?

Upgrade typo3 to 4.7.4 or later.

CVE & CISA-KEV Catalog

CVE-2012-3527

MEDIUMEPSS 80th pctl

4.6

CVSS v2

NVD

Description

view_help.php in the backend help system in TYPO3 4.5.x before 4.5.19, 4.6.x before 4.6.12 and 4.7.x before 4.7.4 allows remote authenticated backend users to unserialize arbitrary objects and possibly execute arbitrary PHP code via an unspecified parameter, related to a "missing signature (HMAC)."

CWE-502Deserialization of Untrusted Data

How to fix

Remediation Available

typo3NVD

Affected:>= 4.7.0, < 4.7.4Fixed in:4.7.4CVE-2012-3527derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

2.12%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Vendor Advisory1

typo3.org

Third-Party Advisory2

Mailing List1

openwall.com

Other references2

Related Vulnerabilities

Other CWE-502 (Deserialization of Untrusted Data) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-0669	High	7.2	100%	KEV + Ransom	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-35464	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-29300	Critical	9.8	100%	KEV + Ransom	-
CVE-2025-53770	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-47986	Critical	9.8	100%	KEV + Ransom	-

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.