Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, the Rich Text Editor rendered a chat-transcript username as HTML, allowing stored cross-site scripting. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.
CVE-2026-72730
“—” beside the score: it is equal to the CVSS score beside it.
This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (35th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
- High severity, but no confirmed exploitation yet
The CVE record names the fixed release — apply it.
- CVSS v3
- 8.7
- EG Score
- 8.7HIGHmedium confidence
- EG Risk
- 39EG Risk 39/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity87% × 45%Impact severity (EG Severity): CVSS 8.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.4% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: The CVE record names the fixed release. Apply it within your standard update timelines. - EPSS PROB
- 0.4%
- EPSS %ILE
- 35th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (8.7): severity, escalated by confirmed exploitation. This CVE's 8.7 is its impact severity (EG Severity), not escalated.
- EG Severity
- 8.7 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
- EG Likelihood
- 0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
The CVE record names the fixed release. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
August 10, 2026
Last Modified
September 8, 2026
Advisory Details (5)
Auto-updated Aug 10, 2026commit 9633b8ecaf5a (discourse/discourse)
Fix landed in discourse/discourse commit 9633b8ecaf5a — awaiting tagged release
https://github.com/discourse/discourse/commit/9633b8ecaf5a99f0407f5261b9bd1a05f7dac529commit 7eb35d076ab9 (discourse/discourse)
Fix landed in discourse/discourse commit 7eb35d076ab9 — awaiting tagged release
https://github.com/discourse/discourse/commit/7eb35d076ab9b6a612e86182336ce9787ce402eacommit 3fb1e8ead0d4 (discourse/discourse)
Fix landed in discourse/discourse commit 3fb1e8ead0d4 — awaiting tagged release
https://github.com/discourse/discourse/commit/3fb1e8ead0d4f48d2cf55c8110825c7e8a6a45f5commit 32920affe4ad (discourse/discourse)
Fix landed in discourse/discourse commit 32920affe4ad — awaiting tagged release
https://github.com/discourse/discourse/commit/32920affe4ad97b461ca2ae2f664c5fefc374bafStored XSS chat-transcript username unescaped in Rich Text Editor · Advisory · discourse/discourse · GitHub
https://github.com/discourse/discourse/security/advisories/GHSA-wg48-qxjc-f459Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 45× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 98 of 119 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 100 are merged into the row they repeat. The 21 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-18 03:15 UTCEG score recompute
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-13 08:07 UTCEG score recompute
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-12 15:41 UTCEG score recompute
- 2026-10-11 19:27 UTCEG score recompute
- 2026-10-11 16:42 UTCEG score recompute
- 2026-10-11 14:02 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-06 18:21 UTCEG score recompute
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-05 19:40 UTCEG score recompute
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-05 07:47 UTCEG score recompute
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
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- 2026-10-04 04:25 UTCEG score recompute
- 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-03 00:52 UTCEG score recompute
- 2026-10-02 09:18 UTCEG score recompute
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-30 22:35 UTCEG score recompute
- 2026-09-29 05:22 UTCEG score recompute
- 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-28 02:23 UTCEG score recompute
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-27 12:45 UTCEG score recompute
- 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-25 04:01 UTCEG score recompute
- 2026-09-23 23:36 UTCEG score recompute
- 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-22 22:52 UTCEG score recompute
- 2026-09-21 23:02 UTCEG score recompute
- 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-21 11:09 UTCEG score recompute
- 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-20 02:59 UTCEG score recompute
- 2026-09-19 02:40 UTCEG score recompute
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-18 02:47 UTCEG score recompute
- 2026-09-17 00:45 UTCEG score recompute
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-15 13:53 UTCEG score recompute
- 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-14 01:38 UTCEG score recompute
- 2026-09-13 01:52 UTCEG score recompute
- 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-12 02:05 UTCEG score recompute
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-11 14:11 UTCEG score recompute
- 2026-09-10 13:54 UTCEG score recompute
- 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-09 09:13 UTCEG score recompute
- 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-07 17:17 UTCEG score recompute
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- 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-05 15:39 UTCEG score recompute
- 2026-09-05 01:57 UTCEG score recompute
- 2026-09-04 08:22 UTCEG score recompute
- 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-03 02:30 UTCEG score recompute
- 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-01 15:16 UTCEG score recompute
- 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-30 21:37 UTCEG score recompute
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-30 09:44 UTCEG score recompute
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-29 09:56 UTCEG score recompute
- 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-27 19:42 UTCEG score recompute
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-26 18:54 UTCEG score recompute
- 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-25 17:50 UTCEG score recompute
- 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-24 18:04 UTCEG score recompute
- 2026-08-23 06:07 UTCEG score recompute
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-22 06:21 UTCEG score recompute
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-21 06:35 UTCEG score recompute
- 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-19 18:55 UTCEG score recompute
- 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-18 19:08 UTCEG score recompute
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-72730?
When was the CVE record for CVE-2026-72730 published?
Is CVE-2026-72730 actively exploited?
What is the CVSS score of CVE-2026-72730?
How do I remediate CVE-2026-72730?
Dependency Blast Radius
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