Monthly
Session hijacking in BigBlueButton before 3.0.21 lets an authenticated conference participant predict and reuse other users' session tokens to impersonate them. The bbb-web component generated 16-character sessionToken values (and 12-character auth tokens and internal user IDs) using Apache Commons RandomStringUtils.randomAlphanumeric, a non-cryptographic PRNG, making the token space guessable to anyone who already holds a valid session. Rated CVSS 8.1 with high confidentiality and integrity impact; no public exploit identified at time of analysis.
Insufficiently random temporary file naming in markdownify-mcp (zcaceres, versions through 1.1.0) exposes transiently written content to local users who can predict or race the generated file path. The saveToTempFile function in src/Markdownify.ts affects the webpage-to-markdown, youtube-to-markdown, and bing-search-to-markdown conversion pipelines, allowing a co-located attacker to read converted content before cleanup. No active exploitation has been confirmed (not in CISA KEV), though a proof-of-concept is publicly available; the overall risk is low given the local-only, high-complexity attack requirements reflected in the CVSS 4.0 score of 2.0.
Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery. "Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values." An attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack. Keys used to sign with an affected version should be considered compromised and new keys should be generated.
### Impact Shovel and Federation plugins perform URI obfuscation in their worker (link) state. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
Predictable correlation IDs in Spring AMQP's RabbitTemplate.sendAndReceive() expose request-reply messaging to correlation hijacking when a fixed reply queue is configured. Affected are all widely used Spring AMQP branches from 2.4.x through 4.0.x - a broad install base across Java enterprise applications. A network-positioned attacker with high privileges can exploit the sequential counter to predict future correlation IDs, enabling interception or injection of reply messages into the shared fixed reply queue. No public exploit code exists and this vulnerability is not listed in CISA KEV; CVSS 4.4 Medium reflects real-world limitations from high privilege and complexity requirements despite the changed scope indicator.
Predictable WebSocket session IDs in Spring Framework's spring-websocket module allow remote attackers to guess or forge session identifiers and, when paired with weak authorization rules, hijack or interact with other users' WebSocket sessions. The flaw affects Spring Framework 5.3.x, 6.1.x, 6.2.x, and 7.0.x prior to patched releases; no public exploit identified at time of analysis and EPSS is very low (0.03%).
DNS cache poisoning in Netty's resolver component (io.netty:netty-resolver-dns) enables remote unauthenticated attackers to redirect downstream application traffic to attacker-controlled IPs through a Kaminsky-style spoofing attack. The vulnerability combines two compounding weaknesses present in the default configuration: DNS transaction IDs shuffled with a mathematically predictable Linear Congruential Generator (ThreadLocalRandom), and a static UDP source port resulting from the default ChannelPerResolver channel strategy. No public exploit has been identified at time of analysis and the issue is not listed in CISA KEV, but the Netty project rated it high severity and released fixes in versions 4.1.135.Final and 4.2.15.Final.
Cryptographic weaknesses in the Acer Connect M6E 5G Portable WiFi Router (firmware versions through M6E_AI_1.00.000019) combine TrustAllCerts routines that bypass TLS certificate validation with hard-coded DES symmetric encryption keys, enabling a network-positioned attacker to decrypt traffic between the device and its backend services. CVSS 4.0 rates this 9.2 (Critical) given the unauthenticated network attack surface and high confidentiality/integrity impact, though attack complexity is rated High due to the MITM positioning requirement. There is no public exploit identified at time of analysis and the issue is not listed in CISA KEV.
Silent cryptographic key failure in Netty's OHTTP codec exposes HPKE response encryption to full key prediction. When HKDF_expand or EVP_HPKE_CTX_export fails internally, the library returns a zero-filled byte array rather than propagating the error, and that all-zero material is consumed directly by OHttpCrypto.createResponseAEAD() without any validation. Any OHTTP response encrypted under a failure-induced all-zero AEAD key is fully decryptable by any attacker who knows this behavior exists - the key is deterministic and universal. No public exploit has been identified at time of analysis, and this CVE is not listed in CISA KEV.
Predictable afpd session token generation in Netatalk 2.0.0 through 4.4.2 allows an authenticated remote attacker to forecast or brute-force valid session identifiers within the Apple Filing Protocol daemon. Per CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, the scored impact is limited to high availability disruption, though the reporter tag 'Information Disclosure' suggests potential session-hijacking consequences that may not be fully captured in the CVSS scoring - a discrepancy analysts should verify against the vendor advisory. No public exploit code or CISA KEV listing exists at time of analysis.
Session hijacking in BigBlueButton before 3.0.21 lets an authenticated conference participant predict and reuse other users' session tokens to impersonate them. The bbb-web component generated 16-character sessionToken values (and 12-character auth tokens and internal user IDs) using Apache Commons RandomStringUtils.randomAlphanumeric, a non-cryptographic PRNG, making the token space guessable to anyone who already holds a valid session. Rated CVSS 8.1 with high confidentiality and integrity impact; no public exploit identified at time of analysis.
Insufficiently random temporary file naming in markdownify-mcp (zcaceres, versions through 1.1.0) exposes transiently written content to local users who can predict or race the generated file path. The saveToTempFile function in src/Markdownify.ts affects the webpage-to-markdown, youtube-to-markdown, and bing-search-to-markdown conversion pipelines, allowing a co-located attacker to read converted content before cleanup. No active exploitation has been confirmed (not in CISA KEV), though a proof-of-concept is publicly available; the overall risk is low given the local-only, high-complexity attack requirements reflected in the CVSS 4.0 score of 2.0.
Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery. "Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values." An attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack. Keys used to sign with an affected version should be considered compromised and new keys should be generated.
### Impact Shovel and Federation plugins perform URI obfuscation in their worker (link) state. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
Predictable correlation IDs in Spring AMQP's RabbitTemplate.sendAndReceive() expose request-reply messaging to correlation hijacking when a fixed reply queue is configured. Affected are all widely used Spring AMQP branches from 2.4.x through 4.0.x - a broad install base across Java enterprise applications. A network-positioned attacker with high privileges can exploit the sequential counter to predict future correlation IDs, enabling interception or injection of reply messages into the shared fixed reply queue. No public exploit code exists and this vulnerability is not listed in CISA KEV; CVSS 4.4 Medium reflects real-world limitations from high privilege and complexity requirements despite the changed scope indicator.
Predictable WebSocket session IDs in Spring Framework's spring-websocket module allow remote attackers to guess or forge session identifiers and, when paired with weak authorization rules, hijack or interact with other users' WebSocket sessions. The flaw affects Spring Framework 5.3.x, 6.1.x, 6.2.x, and 7.0.x prior to patched releases; no public exploit identified at time of analysis and EPSS is very low (0.03%).
DNS cache poisoning in Netty's resolver component (io.netty:netty-resolver-dns) enables remote unauthenticated attackers to redirect downstream application traffic to attacker-controlled IPs through a Kaminsky-style spoofing attack. The vulnerability combines two compounding weaknesses present in the default configuration: DNS transaction IDs shuffled with a mathematically predictable Linear Congruential Generator (ThreadLocalRandom), and a static UDP source port resulting from the default ChannelPerResolver channel strategy. No public exploit has been identified at time of analysis and the issue is not listed in CISA KEV, but the Netty project rated it high severity and released fixes in versions 4.1.135.Final and 4.2.15.Final.
Cryptographic weaknesses in the Acer Connect M6E 5G Portable WiFi Router (firmware versions through M6E_AI_1.00.000019) combine TrustAllCerts routines that bypass TLS certificate validation with hard-coded DES symmetric encryption keys, enabling a network-positioned attacker to decrypt traffic between the device and its backend services. CVSS 4.0 rates this 9.2 (Critical) given the unauthenticated network attack surface and high confidentiality/integrity impact, though attack complexity is rated High due to the MITM positioning requirement. There is no public exploit identified at time of analysis and the issue is not listed in CISA KEV.
Silent cryptographic key failure in Netty's OHTTP codec exposes HPKE response encryption to full key prediction. When HKDF_expand or EVP_HPKE_CTX_export fails internally, the library returns a zero-filled byte array rather than propagating the error, and that all-zero material is consumed directly by OHttpCrypto.createResponseAEAD() without any validation. Any OHTTP response encrypted under a failure-induced all-zero AEAD key is fully decryptable by any attacker who knows this behavior exists - the key is deterministic and universal. No public exploit has been identified at time of analysis, and this CVE is not listed in CISA KEV.
Predictable afpd session token generation in Netatalk 2.0.0 through 4.4.2 allows an authenticated remote attacker to forecast or brute-force valid session identifiers within the Apple Filing Protocol daemon. Per CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, the scored impact is limited to high availability disruption, though the reporter tag 'Information Disclosure' suggests potential session-hijacking consequences that may not be fully captured in the CVSS scoring - a discrepancy analysts should verify against the vendor advisory. No public exploit code or CISA KEV listing exists at time of analysis.