Improper Check for filenames with overly long extensions in PostMaster (sending in email) or uploading files (e.g.
Improper Check for filenames with overly long extensions in PostMaster (sending in email) or uploading files (e.g. attaching files to mails) of ((OTRS)) Community Edition and OTRS allows an remote attacker to cause an endless loop. This issue affects: OTRS AG: ((OTRS)) Community Edition 5.0.x version 5.0.38 and prior versions; 6.0.x version 6.0.23 and prior versions. OTRS AG: OTRS 7.0.x version 7.0.12 and prior versions.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Dec 5, 2019
- Updated
- Jun 16, 2026
- EPSS
- 2.6% · 85th percentile
- CWE
- CWE-835
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.6%
CNA vs NVD score
- NVD
- 7.5
- CNA · mitre
- 5.3
- 2.2 point gap
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| otrs | otrs | cpe:2.3:a:otrs:otrs |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- otrs otrs5.0.0 and later · before 5.0.39
- otrs otrs6.0.0 and later · before 6.0.24
- otrs otrs7.0.0 and later · before 7.0.13
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:10 | otrs2 | before 6.0.16-2+deb10u1 | 6.0.16-2+deb10u1 |
| Debian:11 | otrs2 | before 6.0.24-1 | 6.0.24-1 |
| SUSE:Package Hub 15 | otrs | before 5.0.42-bp151.3.3.1 | 5.0.42-bp151.3.3.1 |
| SUSE:Package Hub 15 | otrs | before 5.0.42-bp151.3.3.1 | 5.0.42-bp151.3.3.1 |
| SUSE:Package Hub 15 SP1 | otrs | before 6.0.29-bp152.2.5.4 | 6.0.29-bp152.2.5.4 |
| SUSE:Package Hub 15 SP1 | otrs | before 6.0.29-bp152.2.5.4 | 6.0.29-bp152.2.5.4 |
| SUSE:Package Hub 15 SP2 | otrs | before 6.0.29-bp152.2.8.1 | 6.0.29-bp152.2.8.1 |
Same product
otrs: all recordsOther highest-scoring records for the same primary product.
- CVE-2017-16921In 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 4.0.26, an attacker who i41Plan
- CVE-2024-23790Missing file type check in avatar picture upload39Monitor
- CVE-2022-4427SQL Injection via OTRS Search API39Monitor
- CVE-2026-48188SQL Injection via MySQL Quote Method36Monitor
- CVE-2023-5422SSL Certificates are not checked for E-Mail Handling36Monitor
- CVE-2017-17476Open 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 is disabled, might a36Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:otrs2 | 6.0.24-1 · Debian:11 | Package registry (OSV) |
| opensuse:otrs | 5.0.42-bp151.3.3.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| suse:otrs | 5.0.42-bp151.3.3.1 · SUSE:Package Hub 15 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- lists.opensuse.org/opensuse-security-announce/2020-04/msg00038.html
- lists.opensuse.org/opensuse-security-announce/2020-09/msg00066.html
- lists.opensuse.org/opensuse-security-announce/2020-09/msg00077.html
- community.otrs.com/security-advisory-2019-15-security-update-for-otrs-framework/
- lists.debian.org/debian-lts-announce/2023/08/msg00040.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.