Discourse is an open source platform for community discussion. This vulnerability is not exploitable on the default install of Discourse. A custom feature must be enabled for it to work at all, and the attacker’s payload must pass the CSP to be executed. However, if an attacker succeeds in embedding Javascript that does pass the CSP, it could result in session hijacking for any users that view the attacker’s post. The vulnerability is patched in the latest tests-passed, beta and stable branches. Users are advised to upgrade. Users unable to upgrade should enable and/or restore your site's CSP to the default one provided with Discourse. Remove any embed-able hosts configured.
CVE-2023-29196
This medium-severity CVE scores 4.2 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 76% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.2
- EG Score
- 4.2(medium)
- EG Risk
- 19(Track)EG Risk 19/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity42% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 24%
- KEV
- Not listed
Published
April 18, 2023
Last Modified
November 21, 2024
References (2)
- security-advisories@githubhttps://github.com/discourse/discourse/security/advisories/GHSA-986p-4x8q-8f48
- af854a3a-2127-422b-91ae-364da2661108https://github.com/discourse/discourse/security/advisories/GHSA-986p-4x8q-8f48
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 6× in last 7d / 27× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 160 total refreshes for this CVE.
- 2026-09-06 13:45 UTCEPSS rescore
- 2026-09-05 15:25 UTCEPSS rescore
- 2026-09-04 13:58 UTCEPSS rescore
- 2026-09-04 08:59 UTCOSV refresh
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- 2026-08-17 19:30 UTCOSV refresh
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- 2026-08-12 13:48 UTCEPSS rescore
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- 2026-08-02 15:27 UTCOSV refresh
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- 2026-07-23 02:21 UTCEG score recompute
- 2026-07-22 23:09 UTCEG score recompute
- 2026-07-22 14:06 UTCEPSS rescore
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- 2026-07-15 22:49 UTCOSV refresh
- 2026-07-15 16:56 UTCEPSS rescore
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- 2026-07-15 01:58 UTCEPSS rescore
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- 2026-07-12 05:45 UTCEPSS rescore
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- 2026-07-09 19:08 UTCEPSS rescore
- 2026-07-09 19:08 UTCEPSS rescore
- 2026-07-08 15:13 UTCEPSS rescore
- 2026-07-07 13:44 UTCEPSS rescore
- 2026-07-06 16:26 UTCEPSS rescore
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- 2026-07-02 16:59 UTCEPSS rescore
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- 2026-06-27 23:04 UTCOSV refresh
- 2026-06-27 03:07 UTCEPSS rescore
- 2026-06-25 13:48 UTCEPSS rescore
- 2026-06-25 13:48 UTCEPSS rescore
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Frequently asked(5)
What is CVE-2023-29196?
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Is CVE-2023-29196 actively exploited?
What is the CVSS score of CVE-2023-29196?
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Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2023-29196
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