How severe is CVE-2012-2420?

CVE-2012-2420 has a CVSS 2.0 base score of 1.8, rated low severity.

Is CVE-2012-2420 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-2420?

CVE-2012-2420 primarily affects Intuit Quickbooks. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-2420?

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

When was CVE-2012-2420 published?

CVE-2012-2420 was published on 2012-04-25 and last updated on 2026-06-16.

CVE-2012-2420

CVE-2012-2420 is a low-severity vulnerability in Intuit Quickbooks with a CVSS 2.0 base score of 1.8. 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-200.

Key facts

Severity: Low (CVSS 2.0 base score 1.8)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Intuit Quickbooks
Published: 2012-04-25
Last modified: 2026-06-16

Description

The intu-help-qb (aka Intuit Help System Async Pluggable Protocol) handlers in HelpAsyncPluggableProtocol.dll in Intuit QuickBooks 2009 through 2012, when Internet Explorer is used, might allow remote attackers to obtain sensitive information via a URI with a % (percent) character as its (1) last or (2) second-to-last character, in situations where a certain "post-URL data" buffer contains a 0x0000 character but a buffer overflow does not occur.

Frequently asked questions

What is CVE-2012-2420?: The intu-help-qb (aka Intuit Help System Async Pluggable Protocol) handlers in HelpAsyncPluggableProtocol.dll in Intuit QuickBooks 2009 through 2012, when Internet Explorer is used, might allow remote attackers to obtain sensitive information via a URI with a % (percent) character as its (1) last or (2) second-to-last character, in situations where a certain "post-URL data" buffer contains a 0x0000 character but a buffer overflow does not occur.
How severe is CVE-2012-2420?: CVE-2012-2420 has a CVSS 2.0 base score of 1.8, rated low severity.
Is CVE-2012-2420 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-2420?: CVE-2012-2420 primarily affects Intuit Quickbooks. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-2420?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-2420 published?: CVE-2012-2420 was published on 2012-04-25 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:intuit:quickbooks:2009:*:*:*:*:*:*:*
cpe:2.3:a:intuit:quickbooks:2010:*:*:*:*:*:*:*
cpe:2.3:a:intuit:quickbooks:2011:*:*:*:*:*:*:*
cpe:2.3:a:intuit:quickbooks:2012:*:*:*:*:*:*:*

More vulnerabilities in Intuit Quickbooks

CVE-2007-6387 — Critical (CVSS 9.3): Multiple stack-based buffer overflows in the awApi4.AnswerWorks.1 ActiveX control in awApi4.dll 4.0.0.42, as used by…
CVE-2007-4471 — Critical (CVSS 9.3): Multiple unspecified vulnerabilities in the Intuit QuickBooks Online Edition ActiveX control before 10 allow remote…
CVE-2007-0322 — Critical (CVSS 9.3): Multiple stack-based buffer overflows in the Intuit QuickBooks Online Edition ActiveX control before 10 allow remote…
CVE-2010-5198 — Medium (CVSS 6.9): Multiple untrusted search path vulnerabilities in Intuit QuickBooks 2010 allow local users to gain privileges via a…
CVE-2012-2418 — Medium (CVSS 6.8): Heap-based buffer overflow in the intu-help-qb (aka Intuit Help System Async Pluggable Protocol) handlers in…
CVE-2012-2422 — Low (CVSS 2.9): Intuit QuickBooks 2009 through 2012 might allow remote attackers to obtain pathname information via the…

All CVEs affecting Intuit Quickbooks →

Other CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities

CVE-2026-27604 — Critical (CVSS 10.0): FOSSBilling is a free, open-source billing and client management system. Starting in version 0.5.4 and prior to version…
CVE-2026-40965 — Critical (CVSS 10.0): Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure. The server contains a…
CVE-2026-42826 — Critical (CVSS 10.0): Exposure of sensitive information to an unauthorized actor in Azure DevOps allows an unauthorized attacker to disclose…
CVE-2025-29270 — Critical (CVSS 10.0): Incorrect access control in the realtime.cgi endpoint of Deep Sea Electronics devices DSE855 v1.1.0 to v1.1.26 allows…
CVE-2025-61481 — Critical (CVSS 10.0): An issue in MikroTik RouterOS v.7.14.2 and SwOS v.2.18 exposes the WebFig management interface over cleartext HTTP by…
CVE-2025-53624 — Critical (CVSS 10.0): The Docusaurus gists plugin adds a page to your Docusaurus instance, displaying all public gists of a GitHub user.…

Browse all CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities →