Etherpad Lite <1.6.4 - Admin Authentication Bypass

Etherpad Lite before 1.6.4 is exploitable for admin access. id: CVE-2018-9845 info: name: Etherpad Lite 1.6.4 - Admin Authentication Bypass author: philippedelteil severity: critical description: Etherpad Lite before 1.6.4 is exploitable for admin access. impact: | An attacker can bypass the admi...

Etherpad 2.1.0 <= 3.0.0 - Cross-Site Scripting

Etherpad versions 2.1.0 through 3.0.0 reflect the x-proxy-path request header into admin HTML, JavaScript, and CSS responses without sanitization. An attacker can abuse this behavior to inject crafted content into generated resource URLs, enabling cross-site scripting and cache poisoning scenario...

CVE-2026-55090

Etherpad is a real-time collaborative editor. Prior to 3.3.0, getHTMLFromAtext in src/node/utils/ExportHtml.ts interpolates values from the exportHtmlAdditionalTagsWithData plugin hook into span data attributes without HTML attribute escaping. A pad editor can place an attacker-controlled value...

CVE-2026-55085

Etherpad is a real-time collaborative editor. Prior to 3.3.1, result.appendSpan in src/static/js/domline.ts interpolates the start attribute of a numbered list directly into an unquoted ol start attribute before assigning the generated markup to node.innerHTML. ImportEtherpad.setPadRaw in...

CVE-2026-55088

Etherpad is a real-time collaborative editor. From 2.6.0 until 3.1.0, Etherpad's src/node/hooks/express/tokenTransfer.ts uses POST /tokenTransfer to store an author token for transfer between browsers and exposes it through GET /tokenTransfer/uuid. Although the record includes createdAt, the...

CVE-2026-55086

Etherpad is a real-time collaborative editor. Prior to 3.1.0, src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts derive temporary filenames from Math.random and place them in os.tmpdir. On a host with a shared world-writable temporary directory, a local unprivileged attacker...

CVE-2026-55087

Etherpad is a real-time collaborative editor. From 2.1.0 until 3.1.0, Etherpad uses the attacker-controlled x-proxy-path request header in src/node/hooks/express/admin.ts when substituting paths into HTML, JavaScript, and CSS under /admin without sanitization, Vary: x-proxy-path, or Cache-Control...

EUVD-2026-62741

Etherpad is a real-time collaborative editor. Prior to 3.1.0, src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts derive temporary filenames from Math.random and place them in os.tmpdir. On a host with a shared world-writable temporary directory, a local unprivileged attacker...

CVE-2026-55086 Etherpad: Import/export use Math.random() for temp file paths; predictable paths on shared /tmp enable symlink-based file overwrite

Etherpad is a real-time collaborative editor. Prior to 3.1.0, src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts derive temporary filenames from Math.random and place them in os.tmpdir. On a host with a shared world-writable temporary directory, a local unprivileged attacker...

CVE-2026-55086 Etherpad: Import/export use Math.random() for temp file paths; predictable paths on shared /tmp enable symlink-based file overwrite

Etherpad is a real-time collaborative editor. Prior to 3.1.0, src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts derive temporary filenames from Math.random and place them in os.tmpdir. On a host with a shared world-writable temporary directory, a local unprivileged attacker...

CVE-2026-55086

Etherpad (ep_etherpad-lite) versions prior to 3.1.0 are vulnerable to a symlink-based file overwrite via predictable temporary filenames. The ImportHandler.ts and ExportHandler.ts components derive temp-file paths from Math.random() (~32 bits of entropy), which is predictable within the same Node...

CVE-2026-55085 Etherpad: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in etherpad-lite

Etherpad is a real-time collaborative editor. Prior to 3.3.1, result.appendSpan in src/static/js/domline.ts interpolates the start attribute of a numbered list directly into an unquoted ol start attribute before assigning the generated markup to node.innerHTML. ImportEtherpad.setPadRaw in...

CVE-2026-55085

Etherpad (real-time collaborative editor) is affected by a stored cross-site scripting vulnerability prior to version 3.3.1 . The root cause is in result.appendSpan in src/static/js/domline.ts, which interpolates the start attribute of a numbered list directly into an unquoted ol start attribute ...

EUVD-2026-62740

Etherpad is a real-time collaborative editor. Prior to 3.3.1, result.appendSpan in src/static/js/domline.ts interpolates the start attribute of a numbered list directly into an unquoted ol start attribute before assigning the generated markup to node.innerHTML. ImportEtherpad.setPadRaw in...

CVE-2026-55085 Etherpad: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in etherpad-lite

Etherpad is a real-time collaborative editor. Prior to 3.3.1, result.appendSpan in src/static/js/domline.ts interpolates the start attribute of a numbered list directly into an unquoted ol start attribute before assigning the generated markup to node.innerHTML. ImportEtherpad.setPadRaw in...

CVE-2026-55089

Etherpad (real-time collaborative editor) versions 2.1.0 through 3.1.0 contain a critical authorization bypass in the OAuth authorization_code path. The APIHandler.ts file checks only for the presence of the admin JWT claim rather than its boolean value, while OAuth2Provider.ts issues admin: fals...

CVE-2026-55089 Etherpad: JWT `admin` claim presence-only check lets non-admin OAuth users invoke every Etherpad HTTP API endpoint

Etherpad is a real-time collaborative editor. From 2.1.0 until 3.1.0, Etherpad's src/node/handler/APIHandler.ts authorizes requests to /api/2/ in the authorizationcode OAuth path by using requiredClaims with the admin claim. This check requires only that the claim exists, while...

EUVD-2026-62737

Etherpad is a real-time collaborative editor. From 2.1.0 until 3.1.0, Etherpad's src/node/handler/APIHandler.ts authorizes requests to /api/2/ in the authorizationcode OAuth path by using requiredClaims with the admin claim. This check requires only that the claim exists, while...

CVE-2026-55089 Etherpad: JWT `admin` claim presence-only check lets non-admin OAuth users invoke every Etherpad HTTP API endpoint

Etherpad is a real-time collaborative editor. From 2.1.0 until 3.1.0, Etherpad's src/node/handler/APIHandler.ts authorizes requests to /api/2/ in the authorizationcode OAuth path by using requiredClaims with the admin claim. This check requires only that the claim exists, while...

CVE-2026-55089 Etherpad: JWT `admin` claim presence-only check lets non-admin OAuth users invoke every Etherpad HTTP API endpoint

Etherpad is a real-time collaborative editor. From 2.1.0 until 3.1.0, Etherpad's src/node/handler/APIHandler.ts authorizes requests to /api/2/ in the authorizationcode OAuth path by using requiredClaims with the admin claim. This check requires only that the claim exists, while...