How severe is CVE-2010-4766?

CVE-2010-4766 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2010-4766 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-4766?

CVE-2010-4766 primarily affects Otrs. In total, 94 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-4766?

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

When was CVE-2010-4766 published?

CVE-2010-4766 was published on 2011-03-18 and last updated on 2026-06-16.

CVE-2010-4766

CVE-2010-4766 is a medium-severity vulnerability in Otrs 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Otrs
Published: 2011-03-18
Last modified: 2026-06-16

Description

The AgentTicketForward feature in Open Ticket Request System (OTRS) before 2.4.7 does not properly remove inline images from HTML e-mail messages, which allows remote attackers to obtain potentially sensitive image information in opportunistic circumstances by reading a forwarded message in a standard e-mail client.

Frequently asked questions

What is CVE-2010-4766?: The AgentTicketForward feature in Open Ticket Request System (OTRS) before 2.4.7 does not properly remove inline images from HTML e-mail messages, which allows remote attackers to obtain potentially sensitive image information in opportunistic circumstances by reading a forwarded message in a standard e-mail client.
How severe is CVE-2010-4766?: CVE-2010-4766 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2010-4766 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-4766?: CVE-2010-4766 primarily affects Otrs. In total, 94 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-4766?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2010-4766 published?: CVE-2010-4766 was published on 2011-03-18 and last updated on 2026-06-16.

References

Affected products (94)

cpe:2.3:a:otrs:otrs:*:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:0.5:beta1:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:0.5:beta2:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:0.5:beta3:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:0.5:beta4:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:0.5:beta5:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:0.5:beta6:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:0.5:beta7:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:0.5:beta8:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.0:rc1:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.0:rc2:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.0:rc3:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.1:rc1:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.1.0:rc1:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.1.0:rc2:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.1.2:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.1.3:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.1.4:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.2.0:beta1:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.2.0:beta2:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.2.0:beta3:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.2.3:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.2.4:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.3.0:beta1:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.3.0:beta2:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.3.0:beta3:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.3.0:beta4:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.3.1:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.3.2:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:1.3.3:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:2.0.0:beta1:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:2.0.0:beta2:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:2.0.0:beta4:*:*:*:*:*:*

More vulnerabilities in Otrs

CVE-2026-48188 — Critical (CVSS 9.1): An improper Input Validation vulnerability in OTRS or ((OTRS)) Community Edition database layer module allows an…
CVE-2013-4717 — High (CVSS 8.8): Multiple SQL injection vulnerabilities in Open Ticket Request System (OTRS) Help Desk 3.0.x before 3.0.22, 3.1.x before…
CVE-2017-17476 — High (CVSS 8.8): Open Ticket Request System (OTRS) 4.0.x before 4.0.28, 5.0.x before 5.0.26, and 6.0.x before 6.0.3, when cookie support…
CVE-2017-16921 — High (CVSS 8.8): In OTRS 6.0.x up to and including 6.0.1, OTRS 5.0.x up to and including 5.0.24, and OTRS 4.0.x up to and including…
CVE-2017-16664 — High (CVSS 8.8): Code injection exists in Kernel/System/Spelling.pm in Open Ticket Request System (OTRS) 5 before 5.0.24, 4 before…
CVE-2017-15864 — High (CVSS 8.8): In the Agent Frontend in Open Ticket Request System (OTRS) 3.3.x through 3.3.18, with a crafted URL it is possible to…

All CVEs affecting Otrs →

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 →