CVE-2017-16921
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 4.0.26, an attacker who is logged into OTRS as an agent can manipulate form parameters (related to PGP) and execute arbitrary shell…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 19.9%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
Description
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 4.0.26, an attacker who is logged into OTRS as an agent can manipulate form parameters (related to PGP) and execute arbitrary shell commands with the permissions of the OTRS or web server user.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 19.90% probability · 97th percentile
- Public exploits
- 1 in Exploit-DB · first 21 January 2018
- CISA KEV
- Not listed
- Weakness
- CWE-78
- Affected
- otrs/otrs · debian/debian linux
- Source
- cve@mitre.org
EPSS moved from 14.6% on 21 September 2026 to 19.9% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/162295/OTRS-6.0.1-Remote-Command-Execution.html
- https://lists.debian.org/debian-lts-announce/2017/12/msg00015.htmlMailing List, Third Party Advisory
- https://www.debian.org/security/2017/dsa-4066Mailing List, Third Party Advisory
- https://www.exploit-db.com/exploits/43853/Exploit, Third Party Advisory, VDB Entry
- https://www.otrs.com/security-advisory-2017-09-security-update-otrs-framework/Issue Tracking, Patch, Vendor Advisory
- http://packetstormsecurity.com/files/162295/OTRS-6.0.1-Remote-Command-Execution.html
- https://lists.debian.org/debian-lts-announce/2017/12/msg00015.htmlMailing List, Third Party Advisory
- https://www.debian.org/security/2017/dsa-4066Mailing List, Third Party Advisory
- https://www.exploit-db.com/exploits/43853/Exploit, Third Party Advisory, VDB Entry
- https://www.otrs.com/security-advisory-2017-09-security-update-otrs-framework/Issue Tracking, Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.