How severe is CVE-2012-4271?

CVE-2012-4271 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2012-4271 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-4271?

CVE-2012-4271 primarily affects Mark Jaquith Bad Behavior. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-4271?

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

When was CVE-2012-4271 published?

CVE-2012-4271 was published on 2012-08-13 and last updated on 2026-06-16.

CVE-2012-4271

CVE-2012-4271 is a medium-severity vulnerability in Mark Jaquith Bad Behavior with a CVSS 2.0 base score of 4.3. 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-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mark Jaquith Bad Behavior
Published: 2012-08-13
Last modified: 2026-06-16

Description

Multiple cross-site scripting (XSS) vulnerabilities in bad-behavior-wordpress-admin.php in the Bad Behavior plugin before 2.0.47 and 2.2.x before 2.2.5 for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) PATH_INFO, (2) httpbl_key, (3) httpbl_maxage, (4) httpbl_threat, (5) reverse_proxy_addresses, or (6) reverse_proxy_header parameter.

Frequently asked questions

What is CVE-2012-4271?: Multiple cross-site scripting (XSS) vulnerabilities in bad-behavior-wordpress-admin.php in the Bad Behavior plugin before 2.0.47 and 2.2.x before 2.2.5 for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) PATH_INFO, (2) httpbl_key, (3) httpbl_maxage, (4) httpbl_threat, (5) reverse_proxy_addresses, or (6) reverse_proxy_header parameter.
How severe is CVE-2012-4271?: CVE-2012-4271 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2012-4271 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-4271?: CVE-2012-4271 primarily affects Mark Jaquith Bad Behavior. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-4271?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-4271 published?: CVE-2012-4271 was published on 2012-08-13 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:mark_jaquith:bad_behavior:*:*:*:*:*:*:*:*
cpe:2.3:a:mark_jaquith:bad_behavior:2.2.0:*:*:*:*:*:*:*
cpe:2.3:a:mark_jaquith:bad_behavior:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:mark_jaquith:bad_behavior:2.2.2:*:*:*:*:*:*:*
cpe:2.3:a:mark_jaquith:bad_behavior:2.2.3:*:*:*:*:*:*:*
cpe:2.3:a:mark_jaquith:bad_behavior:2.2.4:*:*:*:*:*:*:*
cpe:2.3:a:wordpress:wordpress:-:*:*:*:*:*:*:*

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →