Froxlor 2.0.0 through 2.3.10 is vulnerable to stored cross-site scripting. When a customer (the lowest-privileged authenticated role) uploads an SSL certificate for one of their own domains, the Certificates API add()/update() methods parse it with openssl_x509_parse() and store the issuer organization (issuer['O']) value verbatim without sanitization. Froxlor's table-listing renderer then emits scalar cells through Twig's raw filter, disabling HTML auto-escaping, so when an administrator or reseller opens Domains > SSL certificates the attacker-supplied issuer value executes as script in the privileged user's session. This crosses a privilege boundary from customer to admin and can result in full administrator account takeover; because a Froxlor admin controls webserver, DNS, and PHP configuration applied by a cron job running as root, the issue can be further escalated to command execution as root on the managed server. The issue is fixed in Froxlor 2.3.12.
CVE-2026-100720
“—” beside the score: it is equal to the CVSS score beside it.
Score 8.7 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-26. A secondary CVSS source baseline 8.7; sources differ by 0.0.
Also known asEUVD-2026-87693 (ENISA EUVD) · GHSA-mmqp-fgp4-5q7j (GitHub Security Advisories)Source: ENISA EUVD
- 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.Exploitation0.2% × 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
- 0.2%
- EPSS %ILE
- 11th
- 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.GitHub Security Advisory CVSS
- EG Likelihood
- 0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). 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, and whom BOD 26-04 binds: 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.
The score's inputs: 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
September 26, 2026
Last Modified
September 26, 2026
Advisory Details (2)
Auto-updated Sep 26, 2026Froxlor before 2.3.12 Stored XSS via SSL certificate issuer | Advisories | VulnCheck
https://www.vulncheck.com/advisories/froxlor-before-2.3.12-stored-xss-via-ssl-certificate-issuerStored XSS via SSL certificate issuer enables customer-to-admin account takeover in Froxlor 2.x · Advisory · froxlor/froxlor · GitHub
https://github.com/froxlor/froxlor/security/advisories/GHSA-89vj-gqqr-73p8Vendor Advisories for CVE-2026-100720(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 67× 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.
- 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-26 15:32 UTCEG score recompute
- 2026-10-26 15:32 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-25 15:58 UTCEG score recompute
- 2026-10-25 05:39 UTCEG score recompute
- 2026-10-25 05:39 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-18 05:11 UTCEG score recompute
- 2026-10-17 20:08 UTCEG score recompute
- 2026-10-17 20:08 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.2% · 11th percentile
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- 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-12 16:41 UTCEG score recompute
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-12 01:17 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-11 20:16 UTCEG score recompute
- 2026-10-11 18:29 UTCEG score recompute
- 2026-10-11 15:02 UTCEG score recompute
- 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-10-11 12:53 UTCEG score recompute
- 2026-10-11 12:53 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-11 00:39 UTCEG score recompute
- 2026-10-11 00:39 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-10 12:27 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-10 00:28 UTCEG score recompute
- 2026-10-10 00:27 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-09 12:27 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-09 00:27 UTCEG score recompute
- 2026-10-09 00:27 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-08 12:27 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-08 00:19 UTCEG score recompute
- 2026-10-08 00:19 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-07 12:19 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-07 00:20 UTCEG score recompute
- 2026-10-07 00:20 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-06 12:20 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-06 00:20 UTCEG score recompute
- 2026-10-06 00:20 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-05 12:18 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-05 00:18 UTCEG score recompute
- 2026-10-05 00:18 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-04 12:15 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-04 00:15 UTCEG score recompute
- 2026-10-04 00:15 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-03 12:16 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-03 00:16 UTCEG score recompute
- 2026-10-03 00:16 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-02 12:15 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-02 00:14 UTCEG score recompute
- 2026-10-02 00:14 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-01 12:14 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-10-01 00:15 UTCEG score recompute
- 2026-10-01 00:15 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-09-30 11:47 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-09-29 23:47 UTCEG score recompute
- 2026-09-29 23:47 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-09-29 11:23 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-09-28 23:21 UTCEG score recompute
- 2026-09-28 23:21 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-09-28 11:21 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-09-27 23:21 UTCEG score recompute
- 2026-09-27 23:21 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-09-27 11:21 UTCEG score recompute
- 2026-09-27 11:20 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-09-26 23:17 UTCEG score recompute
- 2026-09-26 23:17 UTCGHSA enrichmentGHSA-mmqp-fgp4-5q7j · GitHub severity CRITICAL · GitHub CVSS 8.7
- 2026-09-26 14:25 UTCEG score recompute
- 2026-09-26 13:33 UTCEG score recomputeFirst assessed: 8.7 HIGH
- 2026-09-26 13:30 UTCMITRE cvelistV5first tracked
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Frequently asked(5)
What is CVE-2026-100720?
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Dependency Blast Radius
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