EUVD-2026-56889
GHSA-r9w2-wp2g-mfgm
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
PR:L for required group membership; UI:R as victim must load the message view; S:C and C:H for cross-user session token exfiltration; no integrity or availability impact confirmed in description.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
telegram-search contains a stored cross-site scripting vulnerability that allows remote attackers to execute arbitrary JavaScript in victims' browsers by sending crafted messages containing unsanitized HTML to a shared Telegram group. The highlightKeyword function in MessageList.vue passes raw message content directly to v-html without HTML escaping or sanitization, enabling stored, cross-user, zero-click execution of injected payloads such as image onerror handlers when victims browse or search messages.
AnalysisAI
Stored XSS in telegram-search (versions ≤ 1.2.8) allows any group member to execute arbitrary JavaScript in co-members' browsers by sending crafted messages to a shared Telegram group. The highlightKeyword function in MessageList.vue returned attacker-controlled message text directly to Vue's v-html directive without HTML escaping, creating a persistent, cross-user sink that fires when victims browse or search the message archive - zero clicks required on the victim's side beyond opening the interface. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold membership in the same Telegram group that is indexed by the target telegram-search deployment - this is the sole access prerequisite and the primary limiting factor, as it prevents unauthenticated external attackers from injecting payloads. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.2 with vector AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N accurately reflects the attack profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has joined a shared Telegram group indexed by a vulnerable telegram-search instance sends a message containing a payload such as an img tag with an onerror attribute that beacons session cookies or tokens to an attacker-controlled server. When any other group member opens the telegram-search web UI and the message list or search results are rendered, the highlightKeyword function processes the message and v-html injects it as live HTML into the DOM, silently executing the JavaScript in the victim's browser context without any additional user interaction beyond navigating to the page. … |
| Remediation | Apply the fix introduced in commit 54f6adced844ce9990228d75e31348bfed934e05 (https://github.com/groupultra/telegram-search/commit/54f6adced844ce9990228d75e31348bfed934e05), which is also available via PR #654 (https://github.com/GramSearch/telegram-search/pull/654). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify all telegram-search installations running version 1.2.8 or earlier, and disable message archive search features if operationally feasible to reduce attack surface. …
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
Leaving vuln.today