How severe is CVE-2012-5526?

CVE-2012-5526 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2012-5526 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-5526?

CVE-2012-5526 affects Andy Armstrong Cgi.pm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-5526?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2012-5526 published?

CVE-2012-5526 was published on 2012-11-21 and last updated on 2026-06-16.

CVE-2012-5526

CVE-2012-5526 is a medium-severity vulnerability in Andy Armstrong Cgi.pm with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-16.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-16
Affected product: Andy Armstrong Cgi.pm
Published: 2012-11-21
Last modified: 2026-06-16

Description

CGI.pm module before 3.63 for Perl does not properly escape newlines in (1) Set-Cookie or (2) P3P headers, which might allow remote attackers to inject arbitrary headers into responses from applications that use CGI.pm.

Frequently asked questions

What is CVE-2012-5526?: CGI.pm module before 3.63 for Perl does not properly escape newlines in (1) Set-Cookie or (2) P3P headers, which might allow remote attackers to inject arbitrary headers into responses from applications that use CGI.pm.
How severe is CVE-2012-5526?: CVE-2012-5526 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2012-5526 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-5526?: CVE-2012-5526 affects Andy Armstrong Cgi.pm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-5526?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-5526 published?: CVE-2012-5526 was published on 2012-11-21 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:andy_armstrong:cgi.pm:*:*:*:*:*:*:*:*

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