CVE-2025-46827 json
Graylog Allows Session Takeover via Insufficient HTML Sanitization
published 2025-05-07 18 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-13874 , GHSA-76vf-mpmx-777j
- cvss
- 8.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
Graylog is a free and open log management platform. Prior to versions 6.0.14, 6.1.10, and 6.2.0, it is possible to obtain user session cookies by submitting an HTML form as part of an Event Definition Remediation Step field. For this attack to succeed, the attacker needs a user account with permissions to create event definitions, while the user must have permissions to view alerts. Additionally, an active Input must be present on the Graylog server that is capable of receiving form data (e.g. a HTTP input, TCP raw or syslog etc). Versions 6.0.14, 6.1.10, and 6.2.0 fix the issue. No known workarounds are available, as long as the relatively rare prerequisites are met.
Patch / fix
- maven org.graylog2:graylog2-server 6.0.14, 6.1.10
- graylog graylog 6.0.14, 6.1.10
- org.graylog2 graylog2-server 6.0.14, 6.1.10
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 18 mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 8.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.graylog2:graylog2-server | <6.0.14 >=6.1.0, <6.1.10 |
6.0.14 6.1.10 |
Affected products
- Graylog2 graylog2-server
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/Graylog2/graylog2-server/security/advisories/GHSA-76vf-mpmx-777j
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-46827
advisory
-
github.com
/Graylog2/graylog2-server
package
Sources
- CVE List CVE-2025-46827
- GitHub Advisory GHSA-76vf-mpmx-777j
- NVD CVE-2025-46827
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.