CVE-2023-25172 json
Discourse vulnerable to Cross-site Scripting - user name displayed on post
published 2023-03-17 3 y ago modified 2026-09-08 2 mo ago also BIT-discourse-2023-25172 , EUVD-2023-29137 , GHSA-7pm2-prxw-wrvp
- cvss
- 4.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
Discourse is an open-source discussion platform. Prior to version 3.0.1 of the `stable` branch and version 3.1.0.beta2 of the `beta` and `tests-passed` branches, a maliciously crafted URL can be included in a user's full name field to to carry out cross-site scripting attacks on sites with a disabled or overly permissive CSP (Content Security Policy). Discourse's default CSP prevents this vulnerability. The vulnerability is patched in version 3.0.1 of the `stable` branch and version 3.1.0.beta2 of the `beta` and `tests-passed` branches. As a workaround, enable and/or restore your site's CSP to the default one provided with Discourse.
Patch / fix
- bitnami discourse 3.1.0
- discourse discourse 3.0.1, 3.1.0
- github.com/discourse/discourse@1a5a6f6 commit
- github.com/discourse/discourse@c186a46 commit
- github.com/discourse/discourse#20008 pull request
- github.com/discourse/discourse#20009 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 20 mo ago
Exploit prediction
0.53% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.4 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| OSV | 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 |
|---|---|---|---|
| bitnami | discourse | <3.1.0 |
3.1.0 |
Affected products
- discourse discourse
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/discourse/discourse/pull/20008
patch
-
github.com
/discourse/discourse/pull/20009
patch
-
github.com
/discourse/discourse/commit/1a5a6f66cb821ed29a737311d6fdc2eba5adc915
patch
-
github.com
/discourse/discourse/commit/c186a46910431020e8efc425dec2133e7a99fa9a
patch
-
github.com
/discourse/discourse/security/advisories/GHSA-7pm2-prxw-wrvp
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2023-25172
web
Sources
- CVE List CVE-2023-25172
- NVD CVE-2023-25172
- OSV BIT-discourse-2023-25172
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