How severe is CVE-2018-20800?

CVE-2018-20800 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-20800 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20800?

CVE-2018-20800 primarily affects Otrs. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-20800?

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

When was CVE-2018-20800 published?

CVE-2018-20800 was published on 2019-03-13 and last updated on 2026-06-17.

CVE-2018-20800

CVE-2018-20800 is a medium-severity vulnerability in Otrs with a CVSS 3.x base score of 6.5. 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 3.x base score 6.5)
CVSS v2: 5.5
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Otrs
Published: 2019-03-13
Last modified: 2026-06-17

Description

An issue was discovered in Open Ticket Request System (OTRS) 5.0.31 and 6.0.13. Users updating to 6.0.13 (also patchlevel updates) or 5.0.31 (only major updates) will experience data loss in their agent preferences table.

Frequently asked questions

What is CVE-2018-20800?: An issue was discovered in Open Ticket Request System (OTRS) 5.0.31 and 6.0.13. Users updating to 6.0.13 (also patchlevel updates) or 5.0.31 (only major updates) will experience data loss in their agent preferences table.
How severe is CVE-2018-20800?: CVE-2018-20800 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-20800 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20800?: CVE-2018-20800 primarily affects Otrs. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-20800?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20800 published?: CVE-2018-20800 was published on 2019-03-13 and last updated on 2026-06-17.

References

https://community.otrs.com/security-advisory-2018-10-security-update-for-otrs-framework

Affected products (2)

cpe:2.3:a:otrs:otrs:5.0.31:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:6.0.13:*:*:*:*:*:*:*

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 →