How severe is CVE-2013-7177?

CVE-2013-7177 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2013-7177 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-2013-7177?

CVE-2013-7177 primarily affects Fail2ban. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-7177?

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

When was CVE-2013-7177 published?

CVE-2013-7177 was published on 2014-02-01 and last updated on 2026-06-17.

CVE-2013-7177

CVE-2013-7177 is a medium-severity vulnerability in Fail2ban 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-20.

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-20
Affected product: Fail2ban
Published: 2014-02-01
Last modified: 2026-06-17

Description

config/filter.d/cyrus-imap.conf in the cyrus-imap filter in Fail2ban before 0.8.11 allows remote attackers to trigger the blocking of an arbitrary IP address via a crafted e-mail address that matches an improperly designed regular expression.

Frequently asked questions

What is CVE-2013-7177?: config/filter.d/cyrus-imap.conf in the cyrus-imap filter in Fail2ban before 0.8.11 allows remote attackers to trigger the blocking of an arbitrary IP address via a crafted e-mail address that matches an improperly designed regular expression.
How severe is CVE-2013-7177?: CVE-2013-7177 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2013-7177 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-2013-7177?: CVE-2013-7177 primarily affects Fail2ban. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-7177?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-7177 published?: CVE-2013-7177 was published on 2014-02-01 and last updated on 2026-06-17.

References

Affected products (37)

cpe:2.3:a:fail2ban:fail2ban:*:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.1.0:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.1.1:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.1.2:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.3.0:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.3.1:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.4.0:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.4.1:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.5.0:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.5.1:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.5.2:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.5.3:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.5.4:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.5.5:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.6.0:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.6.1:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.7.0:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.7.1:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.7.2:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.7.3:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.7.4:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.7.5:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.7.6:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.7.7:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.7.8:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.7.9:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.8.0:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.8.1:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.8.2:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.8.3:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.8.4:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.8.5:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.8.6:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.8.7:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.8.7.1:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.8.8:*:*:*:*:*:*:*
cpe:2.3:a:fail2ban:fail2ban:0.8.9:*:*:*:*:*:*:*

More vulnerabilities in Fail2ban

CVE-2012-5642 — High (CVSS 7.5): server/action.py in Fail2ban before 0.8.8 does not properly handle the content of the matches tag, which might allow…
CVE-2007-4321 — Medium (CVSS 6.8): fail2ban 0.8 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts…
CVE-2021-32749 — Medium (CVSS 6.1): fail2ban is a daemon to ban hosts that cause multiple authentication errors. In versions 0.9.7 and prior, 0.10.0…
CVE-2013-7176 — Medium (CVSS 5.0): config/filter.d/postfix.conf in the postfix filter in Fail2ban before 0.8.11 allows remote attackers to trigger the…
CVE-2013-2178 — Medium (CVSS 5.0): The apache-auth.conf, apache-nohome.conf, apache-noscript.conf, and apache-overflows.conf files in Fail2ban before…
CVE-2006-6302 — Medium (CVSS 5.0): fail2ban 0.7.4 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts…

All CVEs affecting Fail2ban →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →