CVE-2026-22200 in the critical feed json
osTicket (1.18.x < 1.18.3, 1.17.x < 1.17.7) PDF Export Arbitrary File Read
published 2026-01-12 9 mo ago modified 2026-11-08 22 h ago also EUVD-2026-1918
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 73.6%
- EPSS 73.6% chance of exploitation in 30 days, percentile 99.4%
- public exploits
- 1
- Metasploit, plus a Nuclei check
Summary
Enhancesoft osTicket versions 1.18.x prior to 1.18.3 and 1.17.x prior to 1.17.7 contain an arbitrary file read vulnerability in the ticket PDF export functionality. A remote attacker can submit a ticket containing crafted rich-text HTML that includes PHP filter expressions which are insufficiently sanitized before being processed by the mPDF PDF generator during export. When the attacker exports the ticket to PDF, the generated PDF can embed the contents of attacker-selected files from the server filesystem as bitmap images, allowing disclosure of sensitive local files in the context of the osTicket application user. This issue is exploitable in default configurations where guests may create tickets and access ticket status, or where self-registration is enabled.
Patch / fix
- Enhancesoft osTicket 1.17.7, 1.18.3
Timeline
- Published
- First public exploit (Metasploit auxiliary/gather/osticket_arbitrary_file_read)
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 9 mo ago
Exploit prediction
73.59% chance of exploitation in the next 30 days, higher than 99.4% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Metasploit auxiliary/gather/osticket_arbitrary_file_read osTicket Arbitrary File Read via PHP Filter Chains in mPDF metasploit auxiliary, normal rank, 2026-01-13
- Nuclei template osTicket - Arbitrary File Read nuclei detection template
- horizon3.ai https://horizon3.ai/attack-research/attack-blogs/ticket-to-shell-exploiting-php-filters-and-cnext-in-osticket-cve-2026-22200/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
- Enhancesoft osTicket
Classification
- Weakness
-
- CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component
References
-
github.com
/osTicket/osTicket/commit/c59b067
patch
-
horizon3.ai
/attack-research/attack-blogs/ticket-to-shell-exploiting-php-filters-and-cnext-in-osticket-cve-2026-22200/
technical-description, exploit
-
github.com
/osTicket/osTicket/releases/tag/v1.18.3
release-notes
-
github.com
/osTicket/osTicket/releases/tag/v1.17.7
release-notes
-
vulncheck.com
/advisories/osticket-pdf-export-arbitrary-file-read
third-party-advisory
Sources
- CVE List CVE-2026-22200
- NVD CVE-2026-22200
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