Zulip is an open-source team collaboration tool. Prior to commit bf28c82dc9b1f630fa8e9106358771b20a0040f7, the API endpoint for creating a card update session during an upgrade flow was accessible to users with only organization member privileges. When the associated Stripe Checkout session is completed, the Stripe webhook updates the organization’s default payment method. Because no billing-specific authorization check is enforced, a regular (non-billing) member can change the organization’s payment method. This vulnerability affected the Zulip Cloud payment processing system, and has been patched as of commit bf28c82dc9b1f630fa8e9106358771b20a0040f7. Self-hosted deploys are no longer affected and no patch or upgrade is required for them.
CVE-2026-25741
This high-severity CVE scores 7.1 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 80% 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).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.1
- EG Score
- 7.1(medium)
- EG Risk
- 32(Track)EG Risk 32/100SSVC: 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 computedSeverity71% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 20%
- KEV
- Not listed
Published
February 26, 2026
Last Modified
June 17, 2026
References (2)
- security-advisories@githubhttps://github.com/zulip/zulip/commit/bf28c82dc9b1f630fa8e9106358771b20a0040f7
- security-advisories@githubhttps://github.com/zulip/zulip/security/advisories/GHSA-vhhx-84f7-rc8j
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 49× 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 129 total refreshes for this CVE.
- 2026-07-30 01:30 UTCEPSS rescore
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Related CVEs(same CWE)
Same CWE
10 shownCWE-863
Frequently asked(5)
What is CVE-2026-25741?
When was CVE-2026-25741 disclosed?
Is CVE-2026-25741 actively exploited?
What is the CVSS score of CVE-2026-25741?
How do I remediate CVE-2026-25741?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-25741
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